11.2 Common Latin suffixes

Types of Latin suffixes

Latin suffixes do a lot of heavy lifting. They tell you a word's part of speech, its grammatical role, and often something about its meaning. Since this unit focuses on Latin roots in English, recognizing these suffixes will help you trace how Latin words evolved into the English vocabulary you already know.

The sections below group suffixes by the type of word they form or modify.

Noun suffixes

These endings signal that a word is a noun and often hint at its gender:

• -us: masculine nouns (dominus, lord)
• -a: feminine nouns (puella, girl)
• -um: neuter nouns (templum, temple)
• -or: abstract nouns formed from verbs (amor, love)
• -tio: action nouns derived from verbs (actio, action)

Adjective suffixes

These turn nouns or verb stems into descriptive words:

• -us/-a/-um: first and second declension adjectives (bonus/bona/bonum, good)
• -is/-e: third declension adjectives (fortis/forte, brave)
• -osus: fullness or abundance (formosus, beautiful)
• -alis: related to a noun (naturalis, natural)
• -bilis: capability or possibility (amabilis, lovable)

Verb suffixes

Latin verbs fall into four conjugation groups, each identified by its infinitive ending:

• -are: first conjugation (amare, to love)
• -ēre (long ē): second conjugation (vidēre, to see)
• -ere (short e): third conjugation (legere, to read)
• -ire: fourth conjugation (audire, to hear)
• -sco: inchoative verbs, indicating the beginning of an action (crescere, to grow)

Note the difference between second and third conjugation: they look similar in writing, but the vowel length differs. Second conjugation has a long ē, while third conjugation has a short e. This distinction matters for conjugation patterns.

Adverb suffixes

Adverbs in Latin are often formed by adding a suffix to an adjective stem:

• -e: from first/second declension adjectives (pulchre, beautifully)
• -iter: from third declension adjectives (fortiter, bravely)
• -tim: manner or distribution (gradatim, step by step)
• -o: from some adjectives (raro, rarely)

Noun-forming suffixes

These suffixes let Latin build new nouns from verbs, adjectives, and other nouns. Many of them survive in English, so learning them here pays off twice.

Person and agent suffixes

These create nouns referring to the person who performs an action:

• -tor/-sor: agent nouns from verbs (actor, doer; compare English "actor")
• -trix: feminine agent nouns (victrix, female conqueror)
• -arius: occupation or profession (librarius, bookseller; compare English "librarian")
• -ista: practitioner or expert (citharista, harpist; compare English "-ist" words)

Abstract noun suffixes

These form nouns that name qualities, states, or concepts rather than physical things:

• -tas: from adjectives (veritas, truth; compare English "verity")
• -tudo: state or quality (fortitudo, bravery; compare English "fortitude")
• -ia: abstract concepts or states (audacia, boldness; compare English "audacity")
• -tio/-sio: from verbs (actio, action; visio, vision)

Diminutive suffixes

Diminutives express smallness or affection. Latin has several, each with masculine, feminine, and neuter forms:

• -ulus/-ula/-ulum: (regulus, little king)
• -ellus/-ella/-ellum: often affectionate (puella originally meant "little girl")
• -culus/-cula/-culum: (homunculus, little man)
• -olus/-ola/-olum: (filiolus, little son)

Action and result suffixes

These form nouns that name the result of an action or the means by which it happens:

• -men: result or means (flumen, river, from fluere, to flow)
• -mentum: instrument or result (ornamentum, ornament)
• -tus: action or result (cantus, song)
• -ura: action or result (pictura, painting)

Adjective-forming suffixes

These suffixes turn nouns and verb stems into adjectives, giving Latin a rich vocabulary for description.

Quality and characteristic suffixes

• -ax: tendency or inclination (audax, bold)
• -idus: state or condition (timidus, fearful)
• -osus: fullness or abundance (formosus, beautiful)
• -eus: material or likeness (aureus, golden, from aurum, gold)
• -ilis: capability or tendency (facilis, easy)

Origin and material suffixes

• -anus: origin or belonging (Romanus, Roman)
• -ensis: place of origin (Atheniensis, Athenian)
• -inus: related to animals or materials (caninus, canine)
• -arius: related to occupation or function (militarius, military)
• -aceus: resemblance or material (chartaceus, made of paper)

Possibility and tendency suffixes

• -bilis: capability or possibility (amabilis, lovable; compare English "amiable")
• -ax: tendency or inclination (loquax, talkative; compare English "loquacious")
• -ivus: tendency or nature (captivus, captive)
• -bundus: fullness of action (moribundus, dying; compare English "moribund")

Verb-forming suffixes

Latin can create new verbs from existing words by adding suffixes that change the meaning or aspect of the action.

Frequentative and intensive suffixes

Frequentative verbs express repeated or habitual action. Intensive verbs emphasize the force of the action:

• -ito: repeated action (clamito, to shout repeatedly, from clamo, to shout)
• -so: intensive emphasis (curso, to run around, from curro, to run)
• -esso: intensive or desire (capesso, to seize eagerly)
• -illo: diminutive/frequentative (cantillo, to sing softly or frequently)

Inchoative suffixes

Inchoative (also called "inceptive") verbs express the beginning of an action or entering a new state:

• -sco: beginning of action (cresco, to begin to grow)
• -asco: from nouns or adjectives (vesperasco, to become evening)
• -esco: often from adjectives (claresco, to become bright)
• -isco: often from nouns (mollisco, to become soft)

Causative suffixes

Causative verbs mean "to make something happen" or "to cause a state":

• -facio: "to make or cause" (calefacio, to make warm)
• -fico: from adjectives or nouns (amplifico, to enlarge)
• -io: causative in some verbs (satio, to satisfy)
• -eo: from some adjectives (albeo, to be/become white)

Adverb-forming suffixes

These suffixes modify verbs, adjectives, or other adverbs to express manner, time, place, and degree.

Manner suffixes

• -e: from first/second declension adjectives (pulchre, beautifully)
• -iter: from third declension adjectives (fortiter, bravely)
• -tim: manner or distribution (nominatim, by name)
• -atim: manner or succession (gradatim, step by step)
• -im: manner or state (statim, immediately)

Time and place suffixes

• -o: time or place (cito, quickly)
• -i: locative adverbs (domi, at home)
• -nde: place from where (unde, from where)
• -ubi: place where (ubi, where)
• -quando: time (aliquando, sometime)

Gender-specific suffixes

Latin nouns and adjectives carry grammatical gender (masculine, feminine, or neuter), and the suffix usually tells you which gender a word belongs to. Getting gender right is necessary for correct agreement between nouns, adjectives, and pronouns.

Masculine suffixes

• -us: most common masculine ending (lupus, wolf)
• -er: some nouns and adjectives (puer, boy)
• -or: abstract nouns (amor, love)
• -tor: agent nouns (victor, conqueror)
• -ax: adjectives indicating tendency (audax, bold)

Feminine suffixes

• -a: most common feminine ending (silva, forest)
• -trix: feminine agent nouns (victrix, female conqueror)
• -tas: abstract nouns (veritas, truth)
• -io: abstract nouns (legio, legion)
• -ina: feminine counterparts (regina, queen)

Neuter suffixes

• -um: most common neuter ending (bellum, war)
• -men: result or means (nomen, name)
• -al: from adjectives (animal, animal)
• -ar: (exemplar, model)
• -ile: place or instrument (cubile, bed)

Number-related suffixes

Latin distinguishes singular and plural through different endings. These are part of the declension system, and recognizing them helps you quickly identify whether a text is talking about one thing or many.

Singular vs plural suffixes

• -us/-i: masculine second declension (servus/servi, slave/slaves)
• -a/-ae: feminine first declension (puella/puellae, girl/girls)
• -um/-a: neuter second declension (templum/templa, temple/temples)
• -es/-es: some third declension nouns have identical singular and plural nominative forms (nubes/nubes, cloud/clouds)
• -us/-ūs: fourth declension (manus/manūs, hand/hands; the plural has a long ū)

Collective suffixes

These form nouns that refer to groups, places, or collections:

• -ium: collective nouns (collegium, college)
• -itas (often listed as -etas): collective groups or states (civitas, citizenship or state)
• -alia: neuter plural nouns for festivals or collections (Saturnalia, festival of Saturn)
• -aria: places or occupations (libraria, bookshop)
• -etum: a place where things grow (olivetum, olive grove)

Case-specific suffixes

Latin uses case endings to show a word's grammatical function in a sentence. Where English relies on word order ("the dog bit the man" vs. "the man bit the dog"), Latin relies on these endings. The same noun changes its ending depending on whether it's the subject, object, possessor, and so on.

Nominative case suffixes

The nominative marks the subject of the sentence:

• -us: masculine second declension (dominus, lord)
• -a: feminine first declension (puella, girl)
• -um: neuter second declension (templum, temple)
• -es: some third declension (miles, soldier)
• -s: some third declension (lex, law)

Accusative case suffixes

The accusative marks the direct object:

• -um: masculine second declension (dominum)
• -am: feminine first declension (puellam)
• -em: many third declension (militem)
• -im: some third declension (vim, force)
• -os/-as/-a: accusative plural for masculine/feminine/neuter (dominos/puellas/templa)

Genitive case suffixes

The genitive shows possession ("of the..."):

• -i: second declension (domini, of the lord)
• -ae: first declension (puellae, of the girl)
• -is: third declension (militis, of the soldier)
• -us: fourth declension (manus, of the hand)
• -orum/-arum: genitive plural for second/first declension (dominorum/puellarum)

Dative case suffixes

The dative marks the indirect object ("to/for the..."):

• -o: second declension (domino, to/for the lord)
• -ae: first declension (puellae, to/for the girl)
• -i: third declension (militi, to/for the soldier)
• -ui: fourth declension (manui, to/for the hand)
• -ibus: dative plural for third and fourth declension (militibus/manibus)

Ablative case suffixes

The ablative expresses means, accompaniment, or separation ("by/with/from the..."):

• -o: second declension (domino)
• -a: first declension (puella)
• -e: many third declension (milite)
• -i: some third declension (mari, from the sea)
• -ibus: ablative plural for third and fourth declension (militibus/manibus)

Tense and aspect suffixes

Latin verbs change their endings to show when an action happens and whether it's complete. These personal endings combine with tense markers to create the full verb form.

Present tense suffixes

These are the personal endings for the present active indicative:

• -o/-m: first person singular (amo, I love)
• -s: second person singular (amas, you love)
• -t: third person singular (amat, he/she/it loves)
• -mus: first person plural (amamus, we love)
• -tis: second person plural (amatis, you [all] love)

Perfect tense suffixes

The perfect tense has its own distinct set of endings, added to the perfect stem:

• -i: first person singular (amavi, I loved / I have loved)
• -isti: second person singular (amavisti, you loved)
• -it: third person singular (amavit, he/she/it loved)
• -imus: first person plural (amavimus, we loved)
• -erunt/-ere: third person plural (amaverunt or amavere, they loved)

Future tense suffixes

Future formation differs by conjugation group. First and second conjugation use -b- as a tense marker, while third and fourth conjugation use vowel changes:

• -bo: first person singular, 1st/2nd conjugation (amabo, I will love)
• -am: first person singular, 3rd/4th conjugation (legam, I will read)
• -bis: second person singular, 1st/2nd conjugation (amabis, you will love)
• -es: second person singular, 3rd/4th conjugation (leges, you will read)
• -bunt: third person plural, 1st/2nd conjugation (amabunt, they will love)

Mood-related suffixes

Mood tells you the speaker's attitude toward the action: is it a fact, a possibility, or a command?

Indicative mood suffixes

The indicative states facts or asks questions. Its present tense endings are the standard personal endings:

• -o/-m: first person singular (amo, I love)
• -s: second person singular (amas, you love)
• -t: third person singular (amat, he/she/it loves)
• -mus: first person plural (amamus, we love)
• -nt: third person plural (amant, they love)

Subjunctive mood suffixes

The subjunctive expresses wishes, possibilities, or hypothetical situations. In the present subjunctive, first conjugation changes its theme vowel from -a- to -e-, while other conjugations use -a-:

• -em/-am: first person singular (amem, I may love)
• -es/-as: second person singular (ames, you may love)
• -et/-at: third person singular (amet, he/she/it may love)
• -emus/-amus: first person plural (amemus, we may love)
• -erim: first person singular perfect subjunctive (amaverim, I may have loved)

Imperative mood suffixes

The imperative gives commands:

• -a/-e: singular imperative, 1st and 2nd conjugation (ama, love; vide, see)
• -e: singular imperative, 3rd conjugation (lege, read)
• -i: singular imperative, 4th conjugation (audi, hear)
• -te: plural imperative for all conjugations (amate, love [all of you])
• -to: future imperative, singular (amato, you shall love)

Voice-specific suffixes

Voice tells you whether the subject performs the action (active) or receives it (passive). Latin marks this distinction directly on the verb through different personal endings.

Active voice suffixes

• -o: first person singular (amo, I love)
• -s: second person singular (amas, you love)
• -t: third person singular (amat, he/she/it loves)
• -mus: first person plural (amamus, we love)
• -nt: third person plural (amant, they love)

Passive voice suffixes

• -or: first person singular (amor, I am loved)
• -ris/-re: second person singular (amaris or amare, you are loved)
• -tur: third person singular (amatur, he/she/it is loved)
• -mur: first person plural (amamur, we are loved)
• -ntur: third person plural (amantur, they are loved)

Comparative and superlative suffixes

Latin adjectives and adverbs have three degrees: positive (the base form), comparative (more), and superlative (most). Each degree uses specific suffixes.

Comparative degree suffixes

The comparative is formed by adding -ior (masculine/feminine) or -ius (neuter) to the adjective stem:

• -ior: masculine and feminine comparative (altior, higher/taller)
• -ius: neuter comparative (altius, higher/taller)
• -ius: also used for comparative adverbs (altius, more highly)

Some comparatives are irregular: bonus (good) becomes melior (better), not bonior.

Superlative degree suffixes

The superlative has three main patterns depending on the adjective's ending:

• -issimus/-issima/-issimum: the default for most adjectives (altissimus, highest)
• -errimus: for adjectives ending in -er (pulcherrimus, most beautiful, from pulcher)
• -illimus: for adjectives ending in -ilis (facillimus, easiest, from facilis)
• -ime: superlative adverbs (maxime, most greatly)

Some superlatives are irregular: bonus becomes optimus (best), magnus becomes maximus (greatest).

Common suffix combinations

Latin often stacks suffixes to build complex words. Recognizing these combinations helps you break down unfamiliar vocabulary into parts you already know.

Noun-adjective combinations

• -osus + -tas: abstract noun from an adjective of abundance (formositas, beauty)
• -alis + -tas: abstract noun from a relational adjective (mortalitas, mortality)
• -bilis + -tas: abstract noun of capability (amabilitas, lovableness)
• -ivus + -tas: abstract noun from a tendency adjective (captivitas, captivity)
• -arius + -ium: collective noun related to an occupation (seminarium, nursery)

Verb-noun combinations

• -tor + -ium: place of action (auditorium, lecture hall)
• -tio + -alis: adjective related to an action (rationalis, rational)
• -tus + -osus: adjective of fullness related to an action (fructuosus, fruitful)
• -men + -tum: instrument or result (monumentum, monument)

Suffix evolution

Understanding how Latin suffixes changed over time connects your Latin study to the modern Romance languages (Spanish, French, Italian, Portuguese, Romanian) and to English.

Classical vs Vulgar Latin suffixes

As spoken Latin evolved into the Romance languages, many suffixes shifted in predictable ways:

• -tio/-sio → Spanish -ción/-sión (ratio → razón, reason)
• -tas → Spanish -tad/-dad (veritas → verdad, truth)
• -arius → French -aire, Spanish -ario (librarius → libraire, bookseller)
• -osus → Spanish -oso, French -eux (formosus → hermoso/formeux, beautiful)
• -ilis → Spanish -il, French/Italian -ile (facilis → fácil/facile, easy)

Latin suffixes in Romance languages

• -tor → French -teur, Italian -tore (actor → acteur/attore)
• -atus → Spanish -ado, French -é (amatus → amado/aimé, loved)
• -alis → -al in many Romance languages (naturalis → natural/naturel)
• -arius → Spanish -ero, French -ier (caballarius → caballero/chevalier, knight)
• -ellus → Italian -ello, French -eau (castellum → castello/château, castle)