Where does “ความหูเบา” come from?

ความหูเบา (Thai) comes from Thai หูเบา, from Thai หู, from Proto-Tai krwɯːᴬ — ear.

Ancestry of “ความหูเบา”, step by step

ความหูเบา traces back through two separate lines of ancestry.

via Thai หูเบา

StepLanguageWordMeaning
1Thaiหูเบาeasily believing in what one hears; willing to believe too readily; credulous
2Thaiหูear; ear-like part of anything, as bag handle,...
3Proto-Taikrwɯːᴬear

via Thai ความ

StepLanguageWordMeaning
1Thaiความaffair; matter; content; essence; subject;...
2Proto-Taiɣwaːmᴬmatter
Every word from Proto-Tai krwɯːᴬ →Every word from Thai หู →Every word from Thai หูเบา →