Where does “từ khoá” come from?

từ khoá (Vietnamese) comes from Vietnamese từ, from Chinese 字, from Chinese 母, from Proto-Sino-Tibetan *məʔ — mother.

từ khoá (Vietnamese): keyword

Definitions

  1. keyword

Ancestry of “từ khoá”, step by step

từ khoá traces back through two separate lines of ancestry.

via Vietnamese từ

StepLanguageWordMeaning
1Vietnamesetừfrom, since; at, in; word
2Chinese字—
3Chinese母—
4Proto-Sino-Tibetan*məʔmother

via Vietnamese khoá

StepLanguageWordMeaning
1Vietnamesekhoáto lock
2Chinese課—
Every word from Proto-Sino-Tibetan *məʔ →Every word from Chinese 母 →Every word from Chinese 字 →
từ khoá — Etymology, Origin & Word History | Etymology Explorer