Where does “thở dài” come from?

thở dài (Vietnamese) comes from Vietnamese dài, from English die, from Latin die, from Latin dies, from Latin diem, from Proto-Italic djēm, from Proto-Italic *djous, from Proto-Indo-European dyḗws — to be bright; sky, heaven.

thở dài (Vietnamese): to sigh

Definitions

  1. to sigh

Ancestry of “thở dài”, step by step

thở dài traces back through two separate lines of ancestry.

via Vietnamese dài

StepLanguageWordMeaning
1Vietnamesedàilong, lengthy
2EnglishdieTo stop living; to become dead; to undergo death;...
3Latindieablative singular of diēs; day; before the day
4LatindiesA day, "particularly:"
5Latindiemaccusative singular of diēs
6Proto-Italicdjēmaccusative singular of *djous
7Proto-Italic*djous
8Proto-Indo-Europeandyḗwssky, heaven; sky god
9Proto-Indo-Europeandyéwssky, heaven
10Proto-Indo-Europeandyew-to be bright; sky, heaven

via Vietnamese thở

StepLanguageWordMeaning
1Vietnamesethởto breathe out; to exhale; to breathe
2Proto-Vietictʰəhto breathe
Every word from Proto-Indo-European dyew-Every word from Proto-Indo-European dyéwsEvery word from Proto-Indo-European dyḗws