Answer: lour

AnswerCrossword Clue
LOURLook sullen
LOURScowl, old style.
LOURFrown: Var.
LOURScowl: Var.
LOURFrown
LOURFrown or scowl
LOURLook angry or sullen (Var.)
LOURFacial expression of displeasure
LOURLook angry or sullen (var.)
LOURGloomy: var.
LOURFrown (Var.)
LOURLook sullen (Var.)
LOURLook angry or sullen
lourto lower (to appear dark and threatening)