Where does “interictal” come from?
I need to work through this chain carefully. Looking at the chain provided: - English ictal | English ictus | English aldehyde | Latin volvere | Latin volvo | Proto-Indo-European wel- | Proto-Indo-European welH- The headword is "interictal" (English), but the chain seems to trace "aldehyde" and "ictus/ictal" - these don't connect logically to form "interictal." However, "interictal" is a medical term meaning "occurring between seizures" - it comes from "inter-" (between) + "ictal" (relating to seizures, from Latin "ictus" meaning a stroke or seizure). The chain provided appears malformed or mismatched to the headword. Given the constraint that I can "state only what the chain supports" and "do not invent," I cannot accurately trace
interictal (English): Between episodes, attacks, or paroxysms; as
Definitions
- Between episodes, attacks, or paroxysms; as
Ancestry of “interictal”, step by step
| Step | Language | Word | Meaning |
|---|---|---|---|
| 1 | English | ictal | Of or pertaining to a sudden physiologic attack... |
| 2 | English | ictus | The pulse; A sudden attack, blow, stroke, or... |
| 3 | Latin | ictus | hit, struck; stabbed, stung; a blow, stroke,... |
| 4 | Latin | -tus | Forms the past participle of verbs; Forms... |
| 5 | Proto-Italic | -tus | — |
| 6 | Proto-Indo-European | -tus | Derives action nouns from verb roots |