Re (Again)
Redo
re (again) +do
do again
Preheat
heat again
Untie
reverse (take out) tie
Dishonest
not honest
Remake
make again
Rewrite
Re (again) write
write again
Preschool
Before school
Unfair
not fair
Disconnect
reverse (take out) connection
Pretest
test before
Rebrush
Re (again) brush
brush again
Preview
View before
Unclear
not clear
Disapprove
not approve
Unhappy
Reheat
Re (again) heat
to heat again
Prewash
wash before
Unlucky
not lucky
Dislike
not like
Disorganized
Not organized
Rebuild
Re (again) build
build again
Prehistoric
before history
Unplug
reverse (take out) plug
Disassemble
reverse (take apart) assembly
Replay
play again