Bold; intrepid; daring; confident; audacious.Requiring or imparting courage, vigor, and endurance; that must be done boldly or energetically: as, a hardy exploit; hardy occupations.Strong; enduring; capable of resisting fatigue, hardship, or exposure: as, a hardy peasant; a hardy plant.Synonyms Stout-hearted, courageous, valiant, daring. See note under hardihood.Hale, robust, sturdy, tough.To become hardy, daring, or audacious.n. In blacksmithing, a chisel or fuller having a square shank for insertion into a square hole in an anvil.