From Proto-Vietic *raːwʔ; cognate with Muong rão, Tho [Cuối Chăm] /riɛw⁴/, Proto-Pong /*riɛw⁴/.
Compare Proto-Tai *ʰlawᶜ (whence Thai เหล้า (lâo)), Chinese 醪 (OC *ruːw).
rượu • (酒, 溜, 𨢇, 𤄍)