ba bảy hai mốt ngày

== Vietnamese == === Etymology === Literally, “three [times] seven [equals] twenty-one days”, indicating that something takes less than a month. Compare Chinese 三七二十一 (sān qī èrshíyī) === Pronunciation === (Hà Nội) IPA(key): [ʔɓaː˧˧ ʔɓaj˧˩ haːj˧˧ mot̚˧˦ ŋaj˨˩] (Huế) IPA(key): [ʔɓaː˧˧ ʔɓaj˧˨ haːj˧˧ mok̚˦˧˥ ŋaj˦˩] (Saigon) IPA(key): [ʔɓaː˧˧ ʔɓa(ː)j˨˩˦ haːj˧˧ mok̚˦˥ ŋa(ː)j˨˩] === Adverb === ba bảy hai mốt ngày in a short time