em-

Dictionary.com Unabridged

em-

2
variant of en-2. before b, m, p, ph: embolism, emphasis.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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Collins
World English Dictionary
em-
 
prefix
en- before b, m, and p, a variant of en-

en- or em-1
 
prefix forming verbs and verbal derivatives
1.  (from nouns)
 a.  put in or on: entomb; enthrone
 b.  go on or into: enplane
 c.  surround or cover with: enmesh
 d.  furnish with: empower
2.  (from adjectives and nouns) cause to be in a certain condition: enable; encourage; enrich; enslave
 
[via Old French from Latin in-in-²]
 
em- or em-1
 
prefix forming verbs and verbal derivatives
 
[via Old French from Latin in-in-²]

en- or em-2
 
prefix forming verbs and verbal derivatives
in; into; inside: endemic
 
[from Greek (often via Latin); compare in-1, in-²]
 
em- or em-2
 
prefix forming verbs and verbal derivatives
 
[from Greek (often via Latin); compare in-1, in-²]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

em-
from Fr. assimilation of en- to following labial; also from L. ex-, assimilated to following -m-. Also a prefix used to form verbs from adjectives and nouns.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

em- pref.
Variant of en-2.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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