茶 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
KUNYOMI 訓読み
チャ cha サ sa
Examples
茶はインドで広く栽培されている。Tea is widely grown in India.その猫の一方は黒で、もう一方は茶だ。One of the cats is black, the other is brown.これは水っぽい茶だね。This is a weak tea, isn’t it?イギリス人はそのころ茶の貿易を始めた。The English entered into the tea trade at that time.