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Classic usage
Reading level: hard
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
Borrowed from Middle French optique or Medieval Latin opticus, from Ancient Greek ὀπτῐκός (optĭkós, “of or for sight”), from ὀπτός (optós, “visible”) + -ῐκός (-ĭkós, “-ic”, adjectival suffix).
eye, oculus
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tap / space
Classic usage
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