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Classic usage
Reading level: hard
Estimated CEFR level: B2 — Upper-Intermediate
Estimated from word frequency; not an official CEFR classification.
From New Latin energeticus (16th c.), or its source, Ancient Greek ἐνεργητικός (energētikós), from ἐνεργέω (energéō, “to be active”), from ἐνεργός (energós, “active”). By surface analysis, energy + -etic.
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tap / space
Classic usage
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