Underwear or undershirts.
Umpire is a costume idea. It begins with the letter u.
Imp.
It should not. A U-Joint that is worn will make a knocking sound when it starts or reverses.
an apparatus.
Inline Skates.
zipper
jacket
a muffler.
DickDiapersDungarees
Kimono
identity worn by children in world war 2
letter that starts with u is unicorne