机 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
つくえ tsukue
KUNYOMI 訓読み
キ ki
Examples
重荷で机がきしるほどだった。The loaded desk groaned again.私の机は古い。My desk is old.これは机です。This is a desk.私は机を片付けた。I cleared up my desk.机の下に猫がいる。There is a cat under the desk.俺の机には置くな。Don’t put it on my desk.これは私の机です。This is my desk.私は木で机を作った。I made a desk of wood.机の上を片付けよう。Let’s straighten up the desk.メグは机を片づけた。Meg cleared her desk.