波 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
なみ nami
KUNYOMI 訓読み
ハ ha
Examples
くだける波が泡を作った。The breaking waves formed foam.波が高い。The waves are high.今日は波が高い。The waves are high today.波が浜に打ち寄せている。Waves are beating the shore.波は白波が立っていた。The sea was white with foam.船が波に浮かんでいた。The ship rode over the waves.波が立ちはじめた。The waves are rising.光や音は波の形で伝わる。Light and sound travel in waves.波は岩に水しぶきをかけた。The waves sprayed the rocks with water.波はおさまってきた。The waves are subsiding.