en-1 Syllabification: (en-) (also em-)Definition of en- prefix 1forming verbs (added to nouns) expressing entry into the specified state or location:engulf embed 2forming verbs (added to nouns and adjectives) expressing conversion into the specified state (as in encrust, ennoble). often forming verbs having the suffix -en (as in embolden, enliven). 3(added to verbs) in; into; on:ensnare as an intensifier:entangleOrigin:from French, from Latin in-. See also in-2, a commonly found by-formen- in other Oxford dictionaries Definition of en- in the British & World English dictionary