-logist

Etymology tree Proto-Indo-European *leǵ- Ancient Greek λόγος (lógos) Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-i-eh₂ Proto-Hellenic *-íā Ancient Greek -ῐ́ᾱ (-ĭ́ā) Ancient Greek -λογῐ́ᾱ (-logĭ́ā)bor. Latin -logialbor. French -logiebor. English -logy Proto-Indo-European *-id- Proto-Indo-European *-yéti Proto-Indo-European *-idyéti Proto-Hellenic *-íďďō Ancient Greek -ίζω (-ízō) Proto-Hellenic *-tās Ancient Greek -τής (-tḗs) Ancient Greek -ιστής (-istḗs)der. Latin -istader. Old French -istebor. Middle English -ist English -ist English -logist From -logy (“study of”) + -ist (“(agent)”).

来源：wiktionary