Where does “cứng miệng” come from?

cứng miệng (Vietnamese) comes from Vietnamese cùng, from Middle Chinese 宮.

cứng miệng (Vietnamese): speechless; tongue-tied; dumbstruck

Definitions

  1. speechless; tongue-tied; dumbstruck

Ancestry of “cứng miệng”, step by step

cứng miệng traces back through two separate lines of ancestry.

via Vietnamese cùng

StepLanguageWordMeaning
1Vietnamesecùngthe end, limit; with; and
2Middle Chinese宮—

via Vietnamese miệng

StepLanguageWordMeaning
1Vietnamesemiệnga mouth; a member of a family
2Proto-Vietic-mɛːŋʔmouth
Every word from Middle Chinese 宮 →