I was clearing out old files and I stumbled across notes from a class I took in high school. On one of the pages was written:
Prefix Meaning
pre- before
de- away, down
inter- between, among
ob- against
in- into
mono- alone,one
epi- upon
ad- to, towards
un- not
non- not
re- back, again
pro- forward, for
in- not
dis- apart, not
over- above
sub- under
mis- wrong
trans- across, beyond
At the time, I never thought anything about it, but coming to it today, what immediately struck me was the lack of the prefix co- which means together, jointly, mutually. I wonder if that reflected the culture of the times, or if it still would not show up today as one of the most important prefixes...?