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Classic usage
Reading level: hard
Estimated CEFR level: B2 — Upper-Intermediate
Estimated from word frequency; not an official CEFR classification.
Borrowed from Latin pīus (“pious, dutiful, blessed, kind, devout”), from Proto-Indo-European *pewH- (“pure”). Cognate with Old English fǣle (“faithful, trusty, good; dear, beloved”). More at feal.
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Classic usage
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