UNTRUE
something that is untrue is not true
UNCERTAIN
something that is uncertain is not certain
UNTRUE
lie, fabrication, falsehood, fib
UNCERTAIN
unsure
UNSAFE
something that is unsafe is not safe
UNNECESSARY
something that is unnecessary is not necessary
UNSAFE
dangerous, precarious, hazardous
UNNECESSARY
UNKIND
UNTIE
to untie is to undo or loosen a knot
UNKIND
mean, rude, harsh, cruel
UNTIE
loosen, undo, untruss
UNCLEAR
something that is unclear is not clear
UNPACK
to take all the things out of boxes or suitcases, especially for travel
UNCLEAR
obfuscated, hidden, unclear, disguised
UNPACK
to remove from boxes, settle back in
UNUSUAL
something that is unusual is not usual; different or noteworthy
UNCOVER
if you uncover something, you find out more about it - maybe a secret!
UNUSUAL
unique, different, noteworthy, original
UNCOVER
to make clearer