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Classic usage
Pronunciation: /θɪˈsɔːɹəs/
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
16th century, borrowed from Latin thēsaurus, from Ancient Greek θησαυρός (thēsaurós, “storehouse, treasure”); its current English usage/meaning was established soon after the publication of Peter Roget's Thesaurus of English Words and Phrases in 1852. Doublet of treasure.
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tap / space
Classic usage
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