Where does “ความมั่นใจ” come from?

ความมั่นใจ (Thai) comes from Thai มั่นใจ, from Thai ใจ, from Proto-Tai cɤɰᴬ — heart; breath.

ความมั่นใจ (Thai): confidence

Definitions

  1. confidence

Ancestry of “ความมั่นใจ”, step by step

ความมั่นใจ traces back through two separate lines of ancestry.

via Thai มั่นใจ

StepLanguageWordMeaning
1Thaiมั่นใจto be confident; to be certain; to be sure
2Thaiใจheart; mind; spirit; breath
3Proto-Taicɤɰᴬheart; breath

via Thai ความ

StepLanguageWordMeaning
1Thaiความaffair; matter; content; essence; subject;...
2Proto-Taiɣwaːmᴬmatter
Every word from Proto-Tai cɤɰᴬ →Every word from Thai ใจ →Every word from Thai มั่นใจ →
ความมั่นใจ — Etymology, Origin & Word History | Etymology Explorer