by the sweat of brow
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by the sweat of (one's) brow
Through or because of one's own efforts or hard work. By the sweat of his brow, my father turned a barren little plot of land into the flourishing farm you see today. This pair of entrepreneurs has created a billion-dollar company by the sweat of their brow.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
by the sweat of one's brow
Fig. by one's efforts; by one's hard work. Tom raised these vegetables by the sweat of his brow. Sally polished the car by the sweat of her brow.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.