noun / verb
frown
FROWN/fraʊn/
A wrinkling of the brow showing displeasure, concern, or concentration.
The woman's frown pulls her eyebrows together.

Etymology
Old French frognier covered scowling, snorting, and turning up the nose. English frown focuses that range of displeased gestures on contracting the brows.
In context
they start up dark and scowling in the midst of scenes of innocent mirth to chill and frown down every participator