lour
UK[ˈlaʊə(r)]US[ˈlaʊər]
v
(of the sky or weather) to look dark and threatening
v
(of a person) to look angry or sullen; to frown or scowl
Etymology
The word 'lour' has a murky etymological history, likely entering Middle English from a Germanic source. Its core sense of looking dark, threatening, or sullen connects to the idea of a watchful, menacing presence, whether in a person's expression or the gathering clouds of a storm. This semantic link between a brooding human countenance and ominous weather has remained stable for centuries. The word's journey reflects a common metaphorical extension where human emotions are projected onto the natural world.
Analysis
This word is a simplex form. It is of uncertain origin, possibly related to Middle English luren or louren, meaning to frown or look sullen. It may have connections to Middle Low German lūren meaning to lie in wait or watch furtively.
Examples
Dark clouds began to lour on the horizon, promising a heavy storm.
He sat in the corner, louring at anyone who dared to approach him.
Despite the sunshine, a sense of dread made the day seem to lour.