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thumb Etymology Atlas
look through a book or other written material, The part of a slider that may be moved linearly along the slider. Pro
Word
Root
Affix
Tap any word to open its Atlas. Pinch to zoom, drag to pan.
thumb 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.