ngựa quen đường cũ

== Vietnamese == === Etymology === Literally “the horse goes on its familiar path”. Calque of Chinese 老馬識途 / 老马识途 (lão mã thức đồ), but the semantics has changed. === Pronunciation === (Hà Nội) IPA(key): [ŋɨə˧˨ʔ kwɛn˧˧ ʔɗɨəŋ˨˩ ku˦ˀ˥] (Huế) IPA(key): [ŋɨə˨˩ʔ kwɛŋ˧˧ ʔɗɨəŋ˦˩ kʊw˧˨] (Saigon) IPA(key): [ŋɨə˨˩˨ wɛŋ˧˧ ʔɗɨəŋ˨˩ kʊw˨˩˦] === Idiom === ngựa quen đường cũ to lapse back into one's old ways; to relapse into vice