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simultaneous Etymology Atlas
occurring or operating at the same time, Happening at the same moment. Pro
Word
Root
Affix
Tap any word to open its Atlas. Pinch to zoom, drag to pan.
simultaneous 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.