scowl

Short definition from Wiktionary

Noun

1. 1
   The wrinkling of the brows or face in frowning; the expression of displeasure, sullenness, or discontent in the countenance; an angry frown.
2. 2
   Gloom; dark or threatening aspect.
3. 3
   Old workings of iron ore.

Verb

1. 1
   To wrinkle the brows, as in frowning or displeasure; to put on a frowning look; to look sour, sullen, severe, or angry.
2. 2
   To look gloomy, dark, or threatening; to lower.
3. 3
   To look at or repel with a scowl or a frown.
4. 4
   To express by a scowl.