[--]

Jyutping wai2 wai2
Pinyin huī huī

Definitions (Wiktionary)
  1. adj
    rumbling (of thunder, etc.)

[--]

Jyutping wai2 wai2
Pinyin huǐ huǐ

Definitions (CC-CEDICT)
  1. rumbling (of thunder etc)
Definitions (Wiktionary)
  1. adj
    rumbling (of thunder, etc.)