Where does “tối ngày” come from?

tối ngày (Vietnamese) comes from Vietnamese tối, from Vietnamese tí, from Middle Chinese 子, from Proto-Sino-Tibetan *tsəʔ — child, son, offspring; grandson; relatives; nephew/niece.

tối ngày (Vietnamese): all night and all day

Definitions

  1. all night and all day

Ancestry of “tối ngày”, step by step

tối ngày traces back through two separate lines of ancestry.

via Vietnamese tối

StepLanguageWordMeaning
1Vietnamesetốidark; the duration from the late evening to the...
2Vietnamesetíbreast; a little bit; tiny; small
3Middle Chinese子—
4Proto-Sino-Tibetan*tsəʔchild, son, offspring; grandson; relatives; nephew/niece

via Vietnamese ngày

StepLanguageWordMeaning
1Vietnamesengàyday; date; daytime
2Proto-Vietict-ŋarʔto snore
Every word from Proto-Sino-Tibetan *tsəʔ →Every word from Middle Chinese 子 →Every word from Vietnamese tí →