-metry

Etymology tree
Proto-Indo-European *meh₁-
Proto-Indo-European *-tḗr
Proto-Indo-European *-trom
Proto-Hellenic *-tron
Ancient Greek -τρον (-tron)
Ancient Greek μέτρον (métron)
Proto-Indo-European *-h₂
Proto-Indo-European *-éh₂
Proto-Indo-European *-i-eh₂
Proto-Hellenic *-íā
Ancient Greek -ῐ́ᾱ (-ĭ́ā)
Ancient Greek -μετρία (-metría)der.
Latin -metriader.
Old French -métrieder.
English -metry
From Old French -métrie, from Latin -metria, from Ancient Greek -μετρία (-metría), from μέτρον (métron, “measurement”) + -ίᾱ (-íā, “-y: forming abstract nouns”). Equivalent to -meter + -y.