Where does “spasticus” come from?

spasticus (Latin) comes from Ancient Greek σπαστικός, from Ancient Greek -τικός, from Ancient Greek -σις, from Ancient Greek -τις, from Proto-Indo-European -tis — Derives abstract/action nouns from verb roots.

Ancestry of “spasticus”, step by step

StepLanguageWordMeaning
1Ancient Greekσπαστικόςdrawing in, absorbing
2Ancient Greek-τικόςrelating to, suited to, skilled in, able to,...
3Ancient Greek-σιςAdded to verb stems to form abstract nouns or...
4Ancient Greek-τιςretained after dentals
5Proto-Indo-European-tisDerives abstract/action nouns from verb roots

Words derived from “spasticus

Every word from Proto-Indo-European -tis