categorisation

Etymology tree
Proto-Indo-European *ḱe?
Proto-Indo-European *ḱóm
Proto-Indo-European *ḱm̥-th₂der.?
Proto-Hellenic *kətá
Ancient Greek κᾰτᾰ́ (kătắ)
Ancient Greek κᾰτᾰ- (kătă-)
Proto-Indo-European *h₂ger-
Proto-Indo-European *h₂goréh₂
Proto-Hellenic *agorā́
Ancient Greek ἀγορᾱ́ (agorā́)
Ancient Greek -εύς (-eús)
Ancient Greek -εύω (-eúō)
Ancient Greek ἀγορεύω (agoreúō)
Ancient Greek κᾰτήγορος (kătḗgoros)
Proto-Indo-European *-eti
Proto-Indo-European *-eyéti
Proto-Indo-European *-esyéti
Proto-Indo-European *-éh₁ti
Proto-Indo-European *-yeti
Proto-Indo-European *-éh₁yeti
Proto-Indo-European *-yeti
Proto-Indo-European *-éyeti
Ancient Greek -έω (-éō)
Ancient Greek κᾰτηγορέω (kătēgoréō)
Proto-Indo-European *-h₂
Proto-Indo-European *-éh₂
Proto-Indo-European *-i-eh₂
Proto-Hellenic *-íā
Ancient Greek -ῐ́ᾱ (-ĭ́ā)
Ancient Greek κᾰτηγορῐ́ᾱ (kătēgorĭ́ā)bor.
Late Latin catēgoriader.
Middle French categorie
French catégoriebor.
Middle English
English category
English -ise
Proto-Indo-European *-tis
Proto-Indo-European *-Hō
Proto-Indo-European *-tiHō
Proto-Italic *-tiō
Latin -tiō
Latin -ātiōlbor.
Old French -ationbor.
Middle English -acioun
English -ation
English -isation
English categorisation
From category + -isation.