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Jyutping fei1 saan3
Pinyin fēi sàn

Definitions (Wiktionary)
  1. verb, of smoke
    to disperse; (of birds) to fly away to all directions

飛散 [飞-]

Jyutping
Pinyin fēi sàn

Definitions (CC-CEDICT)
  1. (of smoke) to disperse; to dissipate
  2. (of birds) to fly away in all directions