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Jyutping hei2 nou6 mou4 soeng4
Pinyin xǐ nù wú cháng

Definitions (CC-CEDICT)
  1. temperamental
  2. moody
Definitions (粵典–words.hk)
  1. x
Definitions (Wiktionary)
  1. phrase, idiomatic
    moody; with an unstable mood
Definitions (Kaifangcidian)
  1. (沒有對應漢語詞彙)
Examples (Tatoeba—Mandarin-English)
  1. Mandarin
    他喜怒无常,极难相处。
    他喜怒無常,極難相處。
    tā xǐ nù wú cháng , jí nán xiāng chǔ 。
    • He is moody and difficult to get along with.