The story
- Proto-Indo-European*men-
- Proto-Hellenic*mónwos
- Ancient Greekμόνος (mónos)
- Ancient Greekμονο- (mono-)
- Englishmono-
- Proto-Indo-European*bʰewg-
- Proto-Indo-European*bʰunégti
- Proto-Italic*fungōr
- Latinfungor
- Latinfūnctiō
- Old Frenchfonction
- Middle Frenchfunction
- Englishfunction
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élisder.?
- Englishfunctional
- English todaymonofunctional
From mono- + functional.
Etymology from Wiktionary, CC BY-SA 4.0.