柳 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
やなぎ yanagi
KUNYOMI 訓読み
リュウ ryuu
Examples
柳の枝に雪折れなし。Oaks may fall when reeds stand the storm.柳の下の泥鰌。A fox isn’t caught twice in the same snare.いつも柳の下に泥鰌は居らぬ。A fox is not caught twice in the same snare.