← Back to proof
Full Level B1 →
proof Etymology Atlas
Information or facts that show something is true., To read something carefully to find and correct mistakes. Pro
Word
Root
Affix
Tap any word to open its Atlas. Pinch to zoom, drag to pan.
proof is a Level B1 word — Pro only
Pro unlocks the Etymology Atlas for levels A2–C2 — plus FSRS-5 spaced repetition, mastery tracking, and the activity dashboard.