bất chợt

== Vietnamese == === Etymology === bất (不) +‎ chợt. The morpheme bất (不) here is used as an emphatic particle, not a negator. See similar usage in bất thình lình, bất quá. === Pronunciation === (Hà Nội) IPA(key): [ʔɓət̚˧˦ t͡ɕəːt̚˧˨ʔ] (Huế) IPA(key): [ʔɓək̚˦˧˥ t͡ɕəːk̚˨˩ʔ] (Saigon) IPA(key): [ʔɓək̚˦˥ cəːk̚˨˩˨] === Adverb === bất chợt suddenly; unexpectedly; all of a sudden