Prefix: Re-
to do again
redo
not related
unrelated
without a home
homeless
one who types
typist
one who runs
runner
to work again
rework
not acceptable
unacceptable
without a clue
clueless
one who works with biology
biologist
one who operates
operator
to post again
repost
not or opposite of sure
unsure
without sense
senseless
one who draws cartoons
cartoonist
suffix -ly How quick?
quickly
to design again
redesign
not likely
unlikely
without sleep
sleepless
one who strives to be perfect
perfectionist
suffix -ful full of pain
painful
to place again
replace
not predictable
unpredictable
without power
powerless
one who specializes in psychology
psychologist
prefix tri- meaning 3 pods
tripods