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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From Middle English underleyen, from Old English underleċġan (“to underlay, prop, support”), equivalent to under- + lay. Cognate with Dutch onderleggen (“to lay or put under”), German unterlegen (“to underlay”), Swedish underlägga (“to underlay”).
carpet pad, rug pad, underlayment
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Classic usage
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