Where does “catafract” come from?

catafract (Romanian) comes from Latin cataphractus, from Ancient Greek κατάφρακτος, from Ancient Greek -τός, from Proto-Indo-European -tós — Creates verbal adjectives from verb stems.

catafract (Romanian): cataphract

Definitions

cataphract

Ancestry of “catafract”, step by step

Step	Language	Word	Meaning
1	Latin	cataphractus	wearing armor, mailed
2	Ancient Greek	κατάφρακτος	covered, shut up, enclosed
3	Ancient Greek	-τός	creates verbal adjectives of possibility, either...
4	Proto-Indo-European	-tós	Creates verbal adjectives from verb stems

Every word from Proto-Indo-European -tós →Every word from Ancient Greek -τός →Every word from Ancient Greek κατάφρακτος →