The story
- Proto-Indo-European*men-
- Proto-Hellenic*mónwos
- Ancient Greekμόνος (mónos)
- Ancient Greekμονο- (mono-)
- Englishmono-
- Proto-Indo-European*h₂ey-
- Ancient Greekαἰτῐ́ᾱ (aitĭ́ā)
- Proto-Indo-European*leǵ-
- Proto-Indo-European*lóǵos
- Proto-Hellenic*lógos
- Ancient Greekλόγος (lógos)
- Ancient Greekαἰτῐολογῐ́ᾱ (aitĭologĭ́ā)
- Latinaetiologia
- Englishetiology
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Englishetiological
- English todaymonoetiological
From mono- + etiological.
Etymology from Wiktionary, CC BY-SA 4.0.