differentiatory

Etymology tree Proto-Indo-European *dwóh₁ Proto-Indo-European *d(w)is- Proto-Italic *dis- Latin dis- Proto-Indo-European *bʰer- Proto-Indo-European *bʰéreti Proto-Italic *ferō Latin ferō Latin differō Latin differēns Proto-Indo-European *-yós Proto-Italic *-ios Old Latin -ios Latin -ius Latin -ia Latin differentia New Latin differentiō New Latin differentiātusbor. English differentiate Proto-Indo-European *-tōr Proto-Italic *-tōr Latin -tor ▲ Latin -ius Latin -tōriusder. Middle English -orie English -ory English differentiatory From differentiate + -ory.

来源：wiktionary