Where does “colonectomy” come from?

colonectomy (English) comes from English colón, from French côlon, from French colonel, from Middle French coronel, from Italian colonnello, from Italian -ello, from Latin -ellus, from Latin -ulus — Forms agent nouns from verbal roots.

Ancestry of “colonectomy”, step by step

colonectomy traces back through two separate lines of ancestry.

via English colón

StepLanguageWordMeaning
1EnglishcolónThe currency of Costa Rica, divided into 100...
2Frenchcôloncolon
3FrenchcolonelA colonel, highest commissioned officer below...
4Middle Frenchcoronel
5Italiancolonnellocolonel
6Italian-elloAlterative suffix used to form...
7Latin-ellusAlternative form of -ulus; "forming masculine...
8Latin-ulusUsed to form a diminutive of a noun, indicating...
9Proto-Italic-olos
10Proto-Italic-elosForms desubstantival and deadjectival diminutive nouns
11Proto-Indo-European-e-lós
12Proto-Indo-European-lósForms agent nouns from verbal roots

via English ectomy

StepLanguageWordMeaning
1EnglishectomyAny operation involving surgical excision or...
2English-ectomyExcision of; Surgical removal of
3Ancient Greekἐκτομήa cutting out; a segment
4Ancient Greekἐκτέμνωto cut out; to castrate; to divide, zone
5Ancient GreekτέμνωI cut, hew; I maim, wound; I butcher, sacrifice
6Proto-Indo-European-né-Forms mostly transitive imperfective verbs from...
Every word from Proto-Indo-European -lós