The story
- Proto-Indo-European · derived from*ped-tm̥mó-s
- Latin · derived frompessimus“worst”
- English todaypessimize
From Latin pessimus (“worst”) + -ize, modelled after optimize. Pessimus is derived from Proto-Indo-European *ped-tm̥mó-s, from *ped- (“to step, walk; to fall, stumble”) + *-tm̥mó-s (superlative suffix).
Etymology from Wiktionary, CC BY-SA 4.0.