petsaiEtymologyBorrowed from Hokkien 白菜 (pe̍h-chhài). Doublet of pechay and bok choy.petsai means chinese cabbage (either napa cabbage or bok choy). Lexicurio rates it Sui generis — a strength score of 100 out of 100.nounChinese cabbage (either napa cabbage or bok choy)