D defs.my
Entry 1 sense Webster, 1913

Co-

/(kō̇-)/ · IPA /ˈkoʊ-/
01 A form of the prefix com-, signifying with, together, in conjunction, joint. It is used before vowels and some consonants. See Com-.
  1. 1.
    A form of the prefix com-, signifying with, together, in conjunction, joint. It is used before vowels and some consonants. See Com-. See: Com-