Definition of "hardy"

It is an useful sort of the smaller kind of hogs, that is hardy in its nature and of considerable weight in proportion to its size.

1824, R. W. Dickson, “Hogs or Swine § Swing-tailed Breed or Sort”, in A Complete System of Improved Live Stock and Cattle Management; […] ‎, volume 2, London, page 287

Even adding 1mm of thickness to the cardboard, to make it hardier, might use up a substantial forest when multiplied across hundreds of billions of boxes.

2019 November 21, Samanth Subramanian, “How our home delivery habit reshaped the world”, in The Guardian‎

The oat is hardier than wheat, and ripens in higher latitudes.

1880, Arthur Herbert Church, Food: Some Account of Its Sources, Constituents and Uses‎, London: Chapman and Hall, page 72

By watching where the snow melted first, I discovered warmer spots that I knew would be possible locations for late-winter bloomers or borderline hardy plants.

2012, David L. Culp, The Layered Garden: Design Lessons for Year-Round Beauty from Brandywine Cottage, Timber Press, page 503

But he was not ſo hardy to abideThat bitter ſtownd, but turning quicke aſideHis light-foot beaſt, fled faſt away for feare:

1590, Edmund Spenser, “Book I, Canto IX”, in The Faerie Queene. […], London: […] [John Wolfe] for William Ponsonbie, page 354

Across the country, various bands of journalistic hardies — newsroom pros whose services are no longer salient to a crippled and disrupted information economy — have taken matters into their own hands.

2009 June 1, David Carr, “Cast Out, but Still Reporting”, in New York Times‎