鍵 jiàn HSK5 key, bolt Definitions Defs Origin Strokes Stroke Words Sentences Sents Showing: linchpin All meanings 9 jiàn 9 key 7bond 1linchpin 1 1 sentence for 鍵 (jiàn — linchpin) 工人正在检查机器轴承上的锁键。 gōngrén zhèngzài jiǎnchá jīqì zhóuchéng shàng de suǒ jiàn. The worker is checking the locking key on the machine bearing. Source: Dong Chinese Dictionary