complete,complain,computer,
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
complicated,computer and community.
Com means "with" or "together," and these words do add the prefix to existing words: compassion, compromise, commission, compadre, community, commingle, commotion.
duet
See the related link for a list with OVER 1,500 words starting with the prefix IN.
Yes, spec is a prefix. See the related question for a list of words beginning with this prefix.
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.
Bio- means life......and some words areBiologyBiographyBio hazard