← Back to marathon
Full Level B2 →
marathon Etymology Atlas
any long and arduous undertaking, a footrace of 26 miles and 385 yards Pro
Word
Root
Affix
Tap any word to open its Atlas. Pinch to zoom, drag to pan.
marathon is a Level B2 word — Pro only
Pro unlocks the Etymology Atlas for levels A2–C2 — plus FSRS-5 spaced repetition, mastery tracking, and the activity dashboard.