complicated,computer and community.
Yes, 'com-' is a prefix. Check words like:comparecompletecompletion
complete competition competitor
'Com-' is a prefix, in words such as 'complete', 'completion' and numerous others.
computer
complete,complain,computer,
Com means "with" or "together," and these words do add the prefix to existing words: compassion, compromise, commission, compadre, community, commingle, commotion.
compress,combine,compatible,compact,commity,commitment
Combat, comedy, comets, comics, coming, commas, commit, common, compel and comply are words. They begin with the prefix com.
The prefix of "complicate" is "com-".
The prefix for combustion is "com-".
The prefix for complementary is "com-".
The prefix of "compress" is "com-".