proof Etymology Atlas

any factual evidence that helps to establish the truth of something, make resistant to harm Pro

Word Root Affix Click to focus · Double-click to open · Shift-click to pin

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.

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