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Jyutping wui4 naam4
Pinyin huí nán

Definitions (CC-CANTO)
  1. to warm up again (weather)
Definitions (粵典–words.hk)
  1. 名詞
    一種​華​南​嘅​氣​候​現​象​;​大概​春天​嘅​時​候​,​來​自​太平洋​帶有​大量​水汽​嘅​南​風​吹​向​中​國​大​陸​,​令天氣​開始​回暖​同濕度​大幅​上升​,​甚至​會​出現​傢​私​、​地板​、​牆壁​出水​嘅​情​況
    continuous warm and wet weather between spring and summer in southern China; literally "return south"
    • 今日回南,咩衫都唔乾。
      今日回南,咩衫都唔干。
      gam1 jat6 wui4 naam4, me1 saam1 dou1 m4 gon1.
      It is starting to "return south" today, it's so humid that washed clothes do not dry.
  2. 參看
    大回南、回南天
Definitions (Wiktionary)
  1. verb, Min-Nan
    to blow from the south (of wind, indicating a change of cold to hot weather)
    (syn.) 回南风, 回南風
  2. noun, Cantonese, Xiamen, Zhangzhou-Hokkien
    warm and humid weather (in the rainy season in southern China)
    (syn.) 水南天, 南风天, 回南天, 南風天
Definitions (Kaifangcidian)
  1. 轉暖 – 转暖
  2. 回暖
  3. 吹南風 – 吹南风
  4. 轉颳南風 – 转刮南风
Examples (粵典–words.hk)
  1. Cantonese
    今日回南,咩衫都唔干。
    今日回南,咩衫都唔乾。
    gam1 jat6 wui4 naam4, me1 saam1 dou1 m4 gon1.
    • It is starting to "return south" today, it's so humid that washed clothes do not dry.