眉 is one of the most commonly used Japanese kanji, and it also has a lot of special readings in addition to the standard onyomi and kunyomi readings.
ONYOMI 音読み
まゆ mayu
KUNYOMI 訓読み
ビ bi ミ mi
Examples
妻の死の知らせを聞いてもまゆ一つ動かさなかった。He did not even raise an eyebrow at the news of his wife’s death.彼は驚いてまゆをつりあげた。He arched his eyebrows in surprise.彼はまゆを上げて難色を示した。He showed his disapproval by raising an eyebrow.