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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English outflowen, from late Old English ūtflōwan (attested in the past tense as ūt flēow), equivalent to out- + flow. The noun is derived from the verb.
escape, leak, leakage
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tap / space
Classic usage
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