One of the mysteries of the English language finally explained.
That grows fresh or new again; flourishing anew.
Mid 17th century; earliest use found in Richard Harwood (d. 1669). From classical Latin revirēscent-, revirēscēns, present participle of revirēscere to become green again, show signs of new growth, to become young and vigorous again, to be restored to a flourishing condition from re- + virēscere.
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