The story
- Proto-Indo-European*úp
- Proto-Indo-European*upér
- Proto-Hellenic*hupér
- Ancient Greekῠ̔πέρ (hŭpér)
- Ancient Greekῠ̔περ- (hŭper-)
- Englishhyper-
- Englishconscientious
- Englishhyperconscientious
- Englishhyper-
- Englishconscientious
- Englishconscientiousness
- English todayhyperconscientiousness
From hyperconscientious + -ness, or from hyper- + conscientiousness.
Etymology from Wiktionary, CC BY-SA 4.0.