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90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
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The disease spread with amazing rapidity.
Business failures have risen rapidly in recent months.
a rapidly expanding human population
This is the British English definition of rapid. View American English definition of rapid.
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