coeno-

word-forming element usually meaning "with, together," from Latin com, archaic form of classical Latin cum "together, together with, in combination," from PIE *kom- "beside, near, by, with" (compare Old English ge-, German ge-). The prefix in Latin sometimes was used as an intensive.

Before vowels and aspirates, it is reduced to co-; before -g-, it is assimilated to cog- or con-; before -l-, assimilated to col-; before -r-, assimilated to cor-; before -c-, -d-, -j-, -n-, -q-, -s-, -t-, and -v-, it is assimilated to con-, which was so frequent that it often was used as the normal form.

also coenobite, "member of a communal religious order," 1630s, from Church Latin coenobita "a cloister brother," from coenobium "a convent," from Greek koinobion "life in community, monastery," from koinos "common" (see coeno-) + bios "life" (from PIE root *gwei- "to live"). Related: Cenobitic; cenobitical.