Where does “nói đâu quên đấy” come from?

nói đâu quên đấy (Vietnamese) comes from Vietnamese đay, from Vietnamese dài, from English die, from Latin die, from Latin dies, from Latin diem, from Proto-Italic djēm, from Proto-Italic *djous — to be bright; sky, heaven.

nói đâu quên đấy (Vietnamese): forgetful; blithe; having a tendency for things to go in one ear and out the other

Definitions

  1. forgetful; blithe; having a tendency for things to go in one ear and out the other

Ancestry of “nói đâu quên đấy”, step by step

nói đâu quên đấy traces back through 3 separate lines of ancestry.

via Vietnamese đay

StepLanguageWordMeaning
1Vietnameseđayjute (genus "Corchorus", especially the jute...
2Vietnamesedàilong, lengthy
3EnglishdieTo stop living; to become dead; to undergo death;...
4Latindieablative singular of diēs; day; before the day
5LatindiesA day, "particularly:"
6Latindiemaccusative singular of diēs
7Proto-Italicdjēmaccusative singular of *djous
8Proto-Italic*djous
9Proto-Indo-Europeandyḗwssky, heaven; sky god
10Proto-Indo-Europeandyéwssky, heaven
11Proto-Indo-Europeandyew-to be bright; sky, heaven

via Vietnamese nói

StepLanguageWordMeaning
1Vietnamesenóito speak, to talk, to say, to tell
2Chinese

via Vietnamese quen

StepLanguageWordMeaning
1Vietnamesequenfamiliar
2Chinese
Every word from Proto-Indo-European dyew-Every word from Proto-Indo-European dyéwsEvery word from Proto-Indo-European dyḗws