A comparative adjective expresses a greater degree of a quality ('braver,' 'more difficult'). In Latin it's formed with -ior (masc./fem.) or -ius (neut.) and declines as a third-declension adjective; comparison is completed with quam plus a noun in the same case, or with the ablative of comparison.
Latin adjectives come in three degrees. The positive is the base form (fortis, 'brave'), the comparative kicks it up one level (fortior, 'braver' or 'more brave'), and the superlative maxes it out (fortissimus, 'bravest' or 'very brave'). The comparative is built by adding -ior (masculine and feminine) or -ius (neuter) to the adjective's stem, and it declines like a third-declension adjective. So fortior, fortioris, fortiori, and so on.
Two things make comparatives trickier than they look. First, when Latin actually compares two things, it does it one of two ways. It either uses quam ('than') with both nouns in the same case (fortior quam frater, 'braver than his brother'), or it drops quam entirely and puts the second noun in the ablative of comparison (fortior fratre, same meaning). Second, a comparative with no comparison in sight often means 'rather' or 'too.' Fortior on its own can mean 'rather brave' or 'too brave,' and that nuance matters when you're translating literally. Watch out for the common irregulars too, like melior (better), peior (worse), maior (greater), and minor (smaller). These show up constantly in Caesar and Vergil.
AP Latin is a translation and analysis exam, and the skill the College Board hammers most is translating 'as literally as possible.' That standard punishes degree errors. If the text says fortior and you write 'very brave' or just 'brave,' you lose the point for that segment, because you've translated the superlative or the positive instead of the comparative. Comparatives appear throughout the required Caesar and Vergil readings, so this isn't a one-unit skill. It's a recognition habit you need on every passage, including the sight-reading sections, where spotting an -ior ending tells you instantly what degree you're dealing with. Comparatives also feed directly into syntax questions, since the ablative of comparison is one of the ablative uses you can be asked to identify by name.
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Superlative Adjective (all units)
The comparative and superlative are two rungs on the same ladder. Comparative -ior/-ius means 'more' or '-er,' while superlative -issimus means 'most,' '-est,' or 'very.' On translation questions, swapping one degree for the other is an automatic error, so train your eye on the endings.
Ablative case (all units)
Latin can skip quam ('than') and put the second item of a comparison straight into the ablative. Fortior fratre means 'braver than his brother.' If you see a comparative adjective next to a bare ablative noun, the ablative of comparison should be your first guess.
Adjective Agreement (all units)
A comparative still has to agree with its noun in gender, number, and case, but it declines on the third-declension pattern even if the positive form was first/second declension. So altus becomes altior, and suddenly you're reading endings like altiorem and altioribus.
Positive Adjective (all units)
The positive degree is the dictionary form and your starting point. Knowing the stem of the positive (fortis → fort-) is how you recognize and build the comparative, and how you tell on sight that fortior is a degree change rather than a new vocabulary word.
Comparatives show up in three ways. In the literal translation FRQs, you have to render the degree exactly. 'Braver' for fortior, not 'brave' and not 'very brave.' Graders score translations segment by segment, so a missed degree costs a real point. In multiple-choice grammar questions, you can be asked to identify an adjective's degree, its case and number, or to name the construction when a comparison uses the ablative instead of quam. And in the short-answer and sight-reading sections, comparatives often carry the author's emphasis (Caesar calling one route 'easier,' Vergil calling a grief 'greater'), so catching them helps you answer comprehension and analysis questions accurately. No released FRQ tests 'comparative adjective' as a standalone term, but the translation rubric makes degree accuracy non-negotiable.
The comparative (-ior/-ius) means 'more' or '-er' and ranks something against one other thing. The superlative (-issimus, -errimus, -illimus) means 'most,' '-est,' or 'very' and puts something at the top of the scale. The fastest tell is the ending. The trap is that a lone comparative can mean 'rather' or 'too,' while a lone superlative can mean 'very,' and mixing those up is one of the most common translation errors on the exam.
Latin comparatives are formed with -ior for masculine and feminine and -ius for neuter, and they decline as third-declension adjectives no matter what declension the positive form was.
Latin expresses 'than' two ways: quam with both nouns in the same case, or no quam at all with the second noun in the ablative of comparison.
A comparative with nothing to compare against usually means 'rather' or 'too,' so fortior alone can be 'rather brave.'
On translation FRQs, you must match the degree exactly, since rendering fortior as 'brave' or 'very brave' loses the point for that segment.
Memorize the irregular comparatives like melior (better), peior (worse), maior (greater), and minor (smaller), because they appear constantly in Caesar and Vergil and don't look like their positive forms.
It's the degree of an adjective meaning 'more' or '-er,' formed with -ior (masculine/feminine) or -ius (neuter) added to the stem. Fortis ('brave') becomes fortior ('braver'), and it declines like a third-declension adjective.
No. When there's no explicit comparison in the sentence, the comparative often means 'rather' or 'too.' Vox altior with nothing being compared is best translated 'a rather loud voice,' and AP graders expect you to capture that nuance.
The comparative (-ior/-ius) means 'more' or '-er,' while the superlative (-issimus and variants) means 'most,' '-est,' or 'very.' On the AP translation rubric, writing 'bravest' for fortior or 'braver' for fortissimus counts as an error.
Either with quam followed by a noun in the same case as the first item (fortior quam frater), or by dropping quam and putting the second noun in the ablative of comparison (fortior fratre). Both translate identically as 'braver than his brother.'
Yes. Multiple-choice questions can ask you to name an adjective's degree or identify the ablative of comparison, and the literal translation FRQs require you to render the comparative degree precisely to earn credit for that segment.