Com- ::
Com- () 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..