Etymology

Probably a calque of Chinese 龍捲 long quyển

Pronunciation

• (Hà Nội) IPA^(key): [vɔj˨˩ zɜwŋ͡m˨˩]
• (Huế) IPA^(key): [vɔj˧˧ ʐɜwŋ͡m˧˧]
• (Hồ Chí Minh City) IPA^(key): [vʲɔj˨˩ ʐɜwŋ͡m˨˩]