Where does “不確実性” come from?

不確実性 (Japanese) comes from Japanese 不確実, from Japanese 不, from Middle Chinese 不.

不確実性 (Japanese): uncertainty

Definitions

  1. uncertainty

Ancestry of “不確実性”, step by step

StepLanguageWordMeaning
1Japanese不確実uncertain; unreliable; inauthentic
2Japanese不un-, non-, in-; bad, poor
3Middle Chinese不—
Every word from Middle Chinese 不 →Every word from Japanese 不 →Every word from Japanese 不確実 →