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Classic usage
Estimated CEFR level: C2 — Proficiency
Estimated from word frequency; not an official CEFR classification.
Borrowed from French viable (further from Latin vīta), with semantic influence of Latin viābilis (“passable”).
feasible, executable, practicable, workable
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tap / space
Classic usage
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Verbault — Brown corpus levels, WordNet definitions, Gutenberg corpus.
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