ichidan verb
cloud; make dim or dull; frown
Transitive verb meaning to make something cloudy, dim, or dull, both literally (e.g., glass, mirror) and figuratively (e.g., mood, expression). Also used for frowning or clouding one's face.
See also: 曇らす
息で窓ガラスを曇らせた。
I fogged up the window with my breath.
He frowned, clouding his face with displeasure.