A prefix from the Latin preposition cum, signifying with, together, in conjunction, very, etc. It is used in the form com- before b, m, p, and sometimes f, and by assimilation becomes col- before l, cor- before r, and con- before any consonant except b, h, l, m, p, r, and w. Before a vowel com- becomes co-; also before h, w, and sometimes before other consonants.
Webster's Revised Unabridged Dictionary
| APA | Webster's. (2011). com-. Retrieved September 21, 2026, from http://smartdefine.org/com-/definitions/1989196 |
| Chicago | Webster's. 2011. "com-" http://smartdefine.org/com-/definitions/1989196 (accessed September 21, 2026). |
| Harvard | Webster's 2011, com-, Smart Define, viewed 21 September, 2026, <http://smartdefine.org/com-/definitions/1989196>. |
| MLA | Webster's. "com-" 27 May 2011. Web. 21 September 2026. <http://smartdefine.org/com-/definitions/1989196> |