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Classic usage
Reading level: hard
Estimated CEFR level: C1 — Advanced
Estimated from word frequency; not an official CEFR classification.
From Middle English soundly, soundely, from Old English ġesundlīċe (“safely, prosperously, gladly”), equivalent to sound + -ly. Originally meaning "safely", the present sense came in the 16ᵗʰ century.
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tap / space
Classic usage
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