The story
- Latin · derived fromex
- Vulgar Latin · derived from*exfortiō
- Old French · derived fromesfort
- Middle French · derived fromeffort
- English todayeffort
From Middle French effort, from Old French esfort, deverbal of esforcier (“to force, exert”), from Vulgar Latin *exfortiō, from Latin ex + fortis (“strong”). Compare typologically Bulgarian усилие (usilie), Czech úsilí, Polish wysiłek, Russian уси́лие (usílije) (< Proto-Slavic *sila).
Words from the same roots
Latinex all →
exchangeawardexsewersoarallegeextenuatingaventailelanceex-excarnificateex contractuexcorticateex negativoexnihilationex nuncex parteex post factoex situexsufflicateex temporeextumescenceex-voto
Etymology from Wiktionary, CC BY-SA 4.0.