Longman Dictionary of Contemporary English
im-
prefix
EXAMPLES FROM OTHER ENTRIES
▪ to implode
The Collaborative International Dictionary
Im-
Im- \Im-\ A form of the prefix in- not, and in- in. See In-. Im- also occurs in composition with some words not of Latin origin; as, imbank, imbitter.
Douglas Harper's Etymology Dictionary
Wiktionary
im-
Etymology 1 pre. (non-gloss definition: Expressing negation; not.) Etymology 2
pre. {{non-gloss definition|Alternative form of the prefix (term em- English), itself variant of (term en- English).}}