from The American Heritage® Dictionary of the English Language, 4th Edition
- Variant of in-1.
- Variant of in-2.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- A form of the prefix in-, used before b, m and p
- Alternative form of the prefix em-, itself variant of en-.
from the GNU version of the Collaborative International Dictionary of English
- A form of the prefix in- not, and in- in. See in-. Im- also occurs in composition with some words not of Latin origin.
Alternative form of in-, of various etymologies and meanings. (Wiktionary)
From em-, from Old French em-, and also from later Middle French im-, partly by confusion with im- of Latin origin. (Wiktionary)