Synonyms for brush up on

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Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.

WORD ORIGIN

"dust-sweeper, a brush for sweeping," late 14c., also, c.1400, "brushwood, brushes;" from Old French broisse (Modern French brosse) "a brush" (13c.), perhaps from Vulgar Latin *bruscia "a bunch of new shoots" (used to sweep away dust), perhaps from Proto-Germanic *bruskaz "underbrush."

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bone up

verbreview something intensely
Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.