Middle English word encrochen comes from Old French croc (A hook-shaped weapon. Grappling hook. Hook.), Old French en- (En- (in; into). En- (intensifier).)

Detailed word origin of encrochen

Dictionary entry	Language	Definition
croc	Old French (fro)	A hook-shaped weapon. Grappling hook. Hook.
en-	Old French (fro)	En- (in; into). En- (intensifier).
encrochier	Old French (fro)	To hook (attach by means of a hook).
encrochen	Middle English (enm)

Words with the same origin as encrochen