bèo

Etymology
.

Noun

 * 1) water cabbage

Etymology
proposes a native origin and compares it to 🇨🇬 (< 🇨🇬); they also consider 🇨🇬  to be a loanword from Austroasiatic.

However, proposes a possible relation of  to, and  counts  among "either East Asian areal words if not Chinese words in disguise"; so the loan direction might have been in reverse, i.e. from.

Noun

 * 1) duckweed

Adjective

 * 1)  cheap, low quality