Usage examples for vigorous
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And from the beginning of the struggle this radical evil was and is the want of earnestness, of a firm purpose, and of a straight, vigorous policy by the administration. – Diary from March 4, 1861, to November 12, 1862 by Adam Gurowski
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It was sent out some time between 1870 and 1880. Vine vigorous, hardy, productive. – Manual of American Grape-Growing by U. P. Hedrick