Where does “不確か” come from?

不確か (Japanese) comes from Japanese 不, from Middle Chinese 不.

不確か (Japanese): uncertain, unreliable

Definitions

  1. uncertain, unreliable

Ancestry of “不確か”, step by step

不確か traces back through two separate lines of ancestry.

via Japanese 不

StepLanguageWordMeaning
1Japanese不un-, non-, in-; bad, poor
2Middle Chinese不—

via Japanese 確か

StepLanguageWordMeaning
1Japanese確かcertain, clear, without a doubt; secure,...
Every word from Middle Chinese 不 →Every word from Japanese 不 →