What is the definition of en prefix?

Answer 1

within, in
en- 1 (also em-)

prefix

1 forming verbs (added to nouns) expressing entry into the specified state or location : engulf | embed.

2 forming 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 : entangle.

ORIGIN from French, from Latin in-. See also in- 2 , a commonly found by-form.

en- 2 (also em-)

prefix

within; inside : encyst | endemic | embolism | empyema.

ORIGIN from Greek. --Oxford American Dictionary