The story
- Proto-Indo-European*sem-
- Proto-Indo-European*sḿ̥teros
- Proto-Hellenic*hə́teros
- Ancient Greekἕτερος (héteros)
- Englishhetero-
- Englishpessimist
- Englishpessimistic
- English todayheteropessimistic
From hetero- + pessimistic.
Etymology from Wiktionary, CC BY-SA 4.0.