rượu

Etymology
From. Cognate with 🇨🇬 Bi, 🇨🇬 [Cuối Chăm] riɛw⁴, Proto-Pong *riɛw⁴. This word is only attested in the more innovative subgroups (Viet-Muong, Tho, Pong), while the more conservative subgroups such as Chutic inheriting reflexes of (originally "yeast", cf.  [Cuang] pdoʔ ("yeast")) or some other words.

Considering the paucity of cognates, the lack of indication of semantic shift from earlier meaning and that it is a cultural item, this is probably ultimately a loanword, although the origin is not yet clear. However, compare 🇨🇬 (whence 🇨🇬), as well as these Sino-Tibetan words: 🇨🇬 (ZS),🇨🇬, and 🇨🇬.

This is not a cognate nor descendant of  (B-S). As indicated by reflexes in other Vietic languages, Vietnamese ‹r-› is inherited and is not the result of spirantization.

Noun

 * 1) rice alcohol