Underlägsen, inferior.
Underlätta, to help.
Underrätta, to advise, to inform.
Underrättelse, notice, advice.
Underskrift, signature.
Underskrifva, to sign.
Underskön, exquisitely beautiful.
Underslef, prevarication.
Underst, undermost.
Understå sig, to make bold, to dare.