Where does “ตกต่ำ” come from?

ตกต่ำ (Thai) comes from Thai ต่ำ, from Proto-Tai tamᴮ — low; short.

ตกต่ำ (Thai): (to be) in decline

Definitions

  1. (to be) in decline

Ancestry of “ตกต่ำ”, step by step

ตกต่ำ traces back through two separate lines of ancestry.

via Thai ต่ำ

StepLanguageWordMeaning
1Thaiต่ำlow
2Proto-Taitamᴮlow; short

via Thai ตก

StepLanguageWordMeaning
1Thaiตกto fall; to drop
2Proto-Taitokᴰto drop
Every word from Proto-Tai tamᴮ →Every word from Thai ต่ำ →