闸 (zhá) means “gear”. The 闸 stroke order has 8 strokes; the animation above shows them one at a time. Its radical is 门. To practise how to write 闸, open writing practice; to hear how to pronounce 闸, use the pronunciation trainer.
Words with 闸
闸 — zhá, gear; brake; sluice; lock (on waterway); electric switch or circuit breaker
