闸 On the HSK 7-9 vocabulary list, at CEFR level C2. zhá ㄓㄚˊ 牐 sluice 牐 lock (on waterway) 閘 sluice sluice gate 閘 to dam up water 閘 brake coll. 閘 electric switch coll. Sources CC-CEDICT, CC BY-SA 4.0 pinyinjs, Apache-2.0 国际中文教育中文水平等级标准, 中华人民共和国教育部, MIT