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Jyutping loeng4 joek6 fu2 hau2
Pinyin liáng yào kǔ kǒu

Definitions (CC-CEDICT)
  1. good medicine tastes bitter (idiom); fig. frank criticism is hard to swallow
Definitions (Wiktionary)
  1. phrase, figuratively, idiomatic
    good advice may be uncomfortable to hear
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    良药苦口。
    良藥苦口。
    liáng yào kǔ kǒu 。
    • Good medicine is bitter to the mouth.