en- | Meaning of prefix en- by etymonline
https://www.etymonline.com/word/en-
en- (1) word-forming element meaning "in; into," from French and Old French en-, from Latin in-"in, into" (from PIE root *en "in"). Typically assimilated before -p-, -b-, -m-, -l-, and -r-.Latin in-became en-in French, Spanish, Portuguese, but remained in-in Italian.. Also used with native and imported elements to form verbs from nouns and adjectives, with a sense "put in or on" …
DA: 50 PA: 67 MOZ Rank: 13