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Jyutping jim4 sat6
Pinyin yán shi

Definitions (CC-CEDICT)
  1. (sealed) tight
  2. close
  3. (hidden) safely
  4. securely
Definitions (Wiktionary)
  1. verb
    to hide safely
  2. adj
    tight; well-sealed
    (syn.) 嚴密, 严密
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)