Un
Untie
not tie(d)
rewrite
write again
forgetful
full of forgetting
artist
person who does art
preheat
heat before
unlock
not locked
redo
full of thanks
scientist
person who does science
before teen
unfair
not fair
reread
read again
painful
full of pain
guitarist
person who plays guitar
premake
make before
unhappy
not happy
retest
test again
careful
full of care
therapist
person who does therapy
preschool
before school
untrue
not true
rebuild
build again
hopeful
full of hope
violinist
person who plays violin
prewash
wash before