ugly, scowling, and offensive
unbending, contemptuous, and scornful
unclean, shameful, and degrading
undecided, wavering, and cautious
unearthly, horrible, and obnoxious
uneasy, overstrained, and melancholy
unity, emphasis, and coherence
unmodulated, cold, and expressionless
unphilosophical, unsystematic, and discursive
unscrupulous, heartless, and hypocritical