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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English retencioun, borrowed from Latin retentiō, retentiōnis, from retentus, the perfect passive participle of retineō (“retain”) (from re- (“back, again”) + teneō (“hold, keep”)).
keeping, holding
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Classic usage
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