闸 Strokes Write it Listen 闸 zhá sluice; lock (on waterway) HSK 7–9 8 strokes Radical 门 Sound + meaning 1 word Built from门meaningméngate, door, entrance, opening甲soundjiǎarmor, shell; fingernails; 1st heavenly stem How it works门 hints at the meaning (gate), and 甲 jiǎ hints at the sound.