verb / noun
lour
LOWW-er/ˈlaʊər/
A dark, threatening, or sullen look.
The young man lours with narrowed eyes and a tightly downturned mouth.

Etymology
Middle English louren meant “to frown or scowl,” connecting a displeased facial expression with a dark, threatening, or sullen appearance. Its deeper ancestry is uncertain.
In context
And all the clouds that lour’d upon our house …
More examples
- She loured at the noisy group outside her window.
- He greets the interruption with a lour.
- The hills disappear beneath a louring sky.
Forms
lour · lours · loured · louring