bội bạc

== Vietnamese == === Etymology === Sino-Vietnamese word from 背 (“to betray”) and 薄 (“stingy; unkind”). === Pronunciation === (Hà Nội) IPA(key): [ʔɓoj˧˨ʔ ʔɓaːk̚˧˨ʔ] (Huế) IPA(key): [ʔɓoj˨˩ʔ ʔɓaːk̚˨˩ʔ] (Saigon) IPA(key): [ʔɓoj˨˩˨ ʔɓaːk̚˨˩˨] === Adjective === bội bạc ungrateful; thankless; unappreciative