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Jyutping jin4 bat1 zeon6 ji3
Pinyin yán bù jìn yì

Definitions (CC-CEDICT)
  1. (conventional letter ending) words cannot fully express what is in my heart (idiom)
Definitions (Wiktionary)
  1. phrase, idiomatic
    what one says does not sufficiently express what one means
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)