Where does “xuống cấp” come from?

xuống cấp (Vietnamese) comes from Vietnamese xuống, from Proto-Vietic tʃɔːŋʔ.

xuống cấp (Vietnamese): to degrade, to deteriorate

Definitions

  1. to degrade, to deteriorate

Ancestry of “xuống cấp”, step by step

xuống cấp traces back through two separate lines of ancestry.

via Vietnamese xuống

StepLanguageWordMeaning
1Vietnamesexuốngto go downwards; to descend; to get off; to go to
2Proto-Vietictʃɔːŋʔ—

via Vietnamese cấp

StepLanguageWordMeaning
1Vietnamesecấprank; level; class; to grant; to issue; Synonym...
2Middle Chinese急—
Every word from Proto-Vietic tʃɔːŋʔ →Every word from Vietnamese xuống →