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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
From cross + word. Various word puzzles referred to as "crosswords" date back to the 1860s. The modern crossword puzzle was invented in 1913 by Arthur Wynne, who coined the name word-cross – crossword first appeared a few weeks later as a typographical error or deliberate transposition.
crossword puzzle
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tap / space
Classic usage
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Verbault — Brown corpus levels, WordNet definitions, Gutenberg corpus.
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