Synchysis is interlocking word order in Latin, where an author arranges paired words in an a-b-a-b pattern (adjective A, adjective B, noun A, noun B) to create emphasis or an unexpected moment. The AP Latin CED names it as a key word-order device in Vergil's Aeneid.
Synchysis (also called interlocked word order) is what happens when a Latin author deliberately scrambles the natural word order so that two noun-adjective pairs weave through each other in an a-b-a-b pattern. The CED's essential knowledge for word order puts it plainly. To create an unexpected or emphatic moment, an author may use interlocking word order, with elements placed in an a-b-a-b format.
Think of it as braiding. In English, we'd say "the savage anger of mindful Juno." Vergil writes saevae memorem Iunonis ob iram (Aeneid 1.4), so you get adjective A (saevae), adjective B (memorem), noun A (Iunonis), noun B (iram). The pairs lock together like interlaced fingers. Because Latin uses case endings instead of word order to show function, Vergil can do this without losing meaning, and the tangled arrangement makes the words feel intertwined on purpose. That's the move you need to notice and explain.
Synchysis lives in the AP Latin CED under learning objective 4.3.G, "Describe the use of word order as a stylistic device in Latin texts," which sits in Unit 4 (Vergil's Aeneid, required excerpts from Books 1 and 2, including Topic 4.3 on Book 2 lines 40-56 and 201-249). It also connects back to Topic 1.22 on epic elements, where Vergil's style first comes into focus. But identifying the pattern is only step one. The exam's analysis objectives (4.3.N, 4.3.O, 4.3.Q) ask you to cite specific Latin, explain how that evidence supports an interpretation, and explain how stylistic information supports a reading of the text. Synchysis is one of the cleanest pieces of stylistic evidence you can deploy, because the a-b-a-b pattern is visible right there in the line.
Keep studying AP Latin Unit 1
Vergilian form (Units 1 and 4)
Synchysis works hand in hand with dactylic hexameter. Vergil chooses where words land in the line partly to fit the meter, so an interlocked pattern is often doing double duty, satisfying the rhythm while spotlighting key words.
Asyndeton (Unit 4)
Asyndeton drops connecting words; synchysis scrambles word positions. Both are deviations from "normal" Latin that signal heightened emotion or drama, which is why they cluster in intense scenes like the serpents attacking Laocoön in Book 2.
Polysyndeton (Unit 4)
Polysyndeton piles on conjunctions for a relentless, building effect. On the exam, synchysis, asyndeton, and polysyndeton form a toolkit of structural devices you can cite, and strong answers name the device and then explain its effect in that specific passage.
Enjambment under LO 4.3.G (Unit 4)
The CED pairs synchysis with enjambment under the same word-order objective. Synchysis interlocks words within a line, while enjambment delays a key word to the start of the next line for suspense. Knowing both gives you two distinct word-order arguments for any passage.
On multiple choice, expect a stem that quotes a line from the Vergil syllabus and asks you to identify the figure of speech, so you need to spot the a-b-a-b pattern fast. On the free-response side, synchysis earns points when you cite the exact Latin words (LO 4.3.N), explain how the interlocking arrangement supports your interpretation (LO 4.3.O), and tie that stylistic choice to meaning or tone (LO 4.3.Q). The trap is naming the device without analysis. "Vergil uses synchysis" scores nothing by itself. "The interlocked order of saevae memorem Iunonis ob iram tangles Juno's anger into her very name, mirroring how inescapable her wrath is for Aeneas" is the kind of sentence readers reward.
Both rearrange word pairs, but the patterns differ. Synchysis interlocks in a-b-a-b order (adjective A, adjective B, noun A, noun B). Chiasmus mirrors in a-b-b-a order, folding the second pair inside the first like a sandwich. Quick check on the exam. Label the four words a-b-a-b or a-b-b-a and the pattern tells you which device you're looking at.
Synchysis is interlocking word order, where paired words are arranged in an a-b-a-b pattern instead of natural Latin order.
The AP Latin CED names synchysis under LO 4.3.G as a device authors use to create unexpected or emphatic moments.
A classic example is Aeneid 1.4, saevae memorem Iunonis ob iram, where the adjectives saevae and memorem interlock with the nouns Iunonis and iram.
Synchysis differs from chiasmus, which uses a mirrored a-b-b-a pattern rather than an interlocked a-b-a-b one.
On free-response questions, naming synchysis is not enough; you must cite the Latin and explain how the interlocked order supports your interpretation.
Latin's case endings make synchysis possible, because the grammar stays clear even when the word order is scrambled.
Synchysis is interlocking word order, where a Latin author arranges two noun-adjective pairs in an a-b-a-b pattern. The AP Latin CED lists it under word order as a stylistic device (LO 4.3.G) used to create unexpected or emphatic moments.
No. Synchysis interlocks words in a-b-a-b order, while chiasmus mirrors them in a-b-b-a order. Label the four words in the line and the pattern instantly tells you which device it is.
No. It's a deliberate choice. Because Latin case endings show each word's function, Vergil can scramble word positions on purpose, and the interlocked pattern visually entangles related ideas, like Juno's anger wrapping around her name in Aeneid 1.4.
Aeneid 1.4, saevae memorem Iunonis ob iram ("because of the mindful anger of savage Juno"). The order runs adjective A (saevae), adjective B (memorem), noun A (Iunonis), noun B (iram), a textbook a-b-a-b interlock.
Yes. It appears in the CED's essential knowledge for Unit 4, so multiple-choice questions can ask you to identify it in a line of Vergil. On essays, citing it only earns credit when you also explain how the interlocked order supports your interpretation of the passage.