Where does “ความยิ่งใหญ่” come from?

ความยิ่งใหญ่ (Thai) comes from Thai ความ, from Proto-Tai ɣwaːmᴬ — matter.

Ancestry of “ความยิ่งใหญ่”, step by step

ความยิ่งใหญ่ traces back through two separate lines of ancestry.

via Thai ความ

StepLanguageWordMeaning
1Thaiความaffair; matter; content; essence; subject;...
2Proto-Taiɣwaːmᴬmatter

via Thai ยิ่งใหญ่

StepLanguageWordMeaning
1Thaiยิ่งใหญ่grand, grandiose, great
2Thaiใหญ่big; very big; large; great; important; main; to...
Every word from Proto-Tai ɣwaːmᴬ →Every word from Thai ความ →