en- /ɪn, en/ BrE AmE prefix [in verbs]
[ Language: Old French ; Origin: Latin in- , from in 'in' ]
1 . to make someone or something be in a particular state or have a particular quality:
enlarge (=make something bigger)
endanger (=put someone in danger)
2 . to go completely around something, or include all of it:
encircle (=surround everything)