Where does “hệ quy chiếu” come from?

hệ quy chiếu (Vietnamese) comes from Vietnamese hệ, from Chinese 客 — guest.

hệ quy chiếu (Vietnamese): frame of reference

Definitions

  1. frame of reference

Ancestry of “hệ quy chiếu”, step by step

hệ quy chiếu traces back through two separate lines of ancestry.

via Vietnamese hệ

StepLanguageWordMeaning
1Vietnamesehệsystem
2Chinese客guest

via Vietnamese quy chiếu

StepLanguageWordMeaning
1Vietnamesequy chiếu—
Every word from Chinese 客 →Every word from Vietnamese hệ →
hệ quy chiếu — Etymology, Origin & Word History | Etymology Explorer