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con-

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  1. variant of com- before a consonant (except b, h, l, p, r) and, by assimilation, before n: convene; condone; connection.
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Origin of con-

From Latin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for con-

con-

prefix
  1. a variant of com-
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for con-

word-forming element meaning "together, with," sometimes merely intensive; the form of com- used in Latin before consonants except -b-, -p-, -l-, -m-, or -r-. In native English formations, co- tends to be used where Latin would use con- (e.g. costar).

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Online Etymology Dictionary, © 2010 Douglas Harper

con- in Medicine

con-

pref.
  1. Variant ofcom-