com- [co-, cog-, col-, con-, cor-] (Latin: together, with; used as a prefix)

com- [co-, cog-, col-, con-, cor-] (Latin: together, with; used as a prefix).

combat:

combatant:

combination:

combine:

combustible:

combustion:

commemorate:

commit:

compact:

companion:

companionable:

company:

comparison:

compassion:

compatible:

compile:

complete:

component:

comport:

compose:

The prefix com- is assimilated to co- before h, w, and all vowels:

coagulate:

coeducation:

coequate:

coerce:

coeternal:

coexist:

cohabitation:

coherence:

cohesion:

The prefix com- becomes, cog- before g:

cogent:

cogitate:

cognition, et al.

The prefix com- becomes, col- before l:

collate:

collateral:

colleague:

collect:

colloquial, et al.

The prefix com- becomes, con- before c, d, g, j, n, q, s, t, v:

conceal:

conceive:

concentrate:

concert:

condominium:

conduct:

conductor:

constancy:

constant:

constellation:

contract:

contraction:

convoluted:

covivant, et al.

The prefix com- becomes, cor- before r:

correct:

correlate:

correspond:

corrigible:

corrigible, et al.


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