-ectomy

Etymology tree Proto-Indo-European *h₁éǵʰ Proto-Indo-European *-s Proto-Indo-European *h₁eǵʰs Proto-Hellenic *eks Ancient Greek ἐκ (ek) Ancient Greek ἐκ- (ek-) Proto-Indo-European *temh₁- Proto-Indo-European *-né- Ancient Greek τέμνω (témnō) Ancient Greek ἐκτέμνω (ektémnō) Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Ancient Greek -ᾱ (-ā) Ancient Greek -η (-ē) Ancient Greek ἐκτομή (ektomḗ)der. English -ectomy From Ancient Greek ἐκτομή (ektomḗ, “a cutting out of”), from ἐκτέμνω (ektémnō, “to cut out”), from ἐκ (ek, “out”) + τέμνω (témnō, “to cut”).

来源：wiktionary