ichidan verb, transitive verb
knit one's brows; furrow one's brow; frown
Almost exclusively used in the set phrase 眉をひそめる (mayu o hisomeru), meaning to frown or knit one's eyebrows in displeasure, worry, or disapproval.
See also: 眉をひそめる
彼の失礼な態度に、彼女は眉をひそめた。
She frowned at his rude attitude.
そのニュースを聞いて、誰もが眉をひそめた。
Everyone knit their brows upon hearing the news.