com-, co-, cog-, col-, con-, cor-
(Latin: together, together with, with)
The prefix com- is assimilated to co- before h, w, and all vowels:
The prefix com- becomes, cog- before g: cognition, [co + gnoscere, "to know"], et al.
The prefix com- becomes, col- before l: colloquial, et al.
The prefix com- becomes, con- before c, d, g, j, n, q, s, t, v: covivant, et al.
The prefix com- becomes, cor- before r: corrigible, et al.
The words for this unit show cartoons for all of the examples of the com-, co-, cog-, col-, con-, cor- entries; however, there are many more of them which exist in other units which are available when you type in a particular word in the search box at the bottom of this page.
The students complained that the new textbook about the origins of words had too many recondite explanations for them to comprehend.2. Etymology: from Latin reconditus, "hidden, secrete" from recondere, "to put away", from re-, "back" + condere, "to hide" + com-, "together" + dare, "to give."