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.