The Collaborative International Dictionary of English v.0.48:

Hardy \Har"dy\, n.
   A blacksmith's fuller or chisel, having a square shank for
   insertion into a square hole in an anvil, called the hardy
   hole.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Hardy \Har"dy\ (h[aum]r"d[y^]), a. [Compar. Hardier
   (-d[i^]*[~e]r); superl. Hardiest.] [F. hardi, p. p. fr. OF.
   hardir to make bold; of German origin, cf. OHG. hertan to
   harden, G. h[aum]rten. See Hard, a.]
   1. Bold; brave; stout; daring; resolute; intrepid.
      [1913 Webster]

            Hap helpeth hardy man alway.          --Chaucer.
      [1913 Webster]

   2. Confident; full of assurance; in a bad sense, morally
      hardened; shameless.
      [1913 Webster]

   3. Strong; firm; compact.
      [1913 Webster]

            [A] blast may shake in pieces his hardy fabric.
                                                  --South.
      [1913 Webster]

   4. Inured to fatigue or hardships; strong; capable of
      endurance; as, a hardy veteran; a hardy mariner.
      [1913 Webster]

   5. Able to withstand the cold of winter.
      [1913 Webster]

   Note: Plants which are hardy in Virginia may perish in New
         England. Half-hardy plants are those which are able to
         withstand mild winters or moderate frosts.
         [1913 Webster]

WordNet (r) 3.0 (2006):

hardy
    adj 1: having rugged physical strength; inured to fatigue or
           hardships; "hardy explorers of northern Canada"; "proud
           of her tall stalwart son"; "stout seamen"; "sturdy young
           athletes" [syn: hardy, stalwart, stout, sturdy]
    2: able to survive under unfavorable weather conditions;
       "strawberries are hardy and easy to grow"; "camels are tough
       and hardy creatures"
    3: invulnerable to fear or intimidation; "audacious explorers";
       "fearless reporters and photographers"; "intrepid pioneers"
       [syn: audacious, brave, dauntless, fearless, hardy,
       intrepid, unfearing]
    n 1: United States slapstick comedian who played the pompous and
         overbearing member of the Laurel and Hardy duo who made
         many films (1892-1957) [syn: Hardy, Oliver Hardy]
    2: English novelist and poet (1840-1928) [syn: Hardy, Thomas
       Hardy]

Moby Thesaurus II by Grady Ward, 1.0:

133 Moby Thesaurus words for "hardy":
   abiding, able-bodied, age-long, aged, ancient, antique, beefy,
   bold, bold-spirited, bouncing, brave, cartilaginous, chewy,
   chivalric, chivalrous, chronic, cohesive, constant, continuing,
   coriaceous, courageous, daring, deciduous, diuturnal, doughty,
   durable, enduring, ephemeral, evergreen, fearless, fibrous, fit,
   flush, forceful, forcible, forcy, full-blooded, full-strength,
   gallant, greathearted, gristly, gutsy, gutty, hale,
   hale and hearty, half-hardy, hard, hard as nails, healthy, hearty,
   hefty, heroic, herolike, husky, immutable, intransient, intrepid,
   inveterate, iron-hard, ironhearted, knightlike, knightly, lasting,
   leatherlike, leathery, lionhearted, long-lasting, long-lived,
   long-standing, long-term, longeval, longevous, lusty, macrobiotic,
   manful, manly, mighty, nervy, obstinate, of long duration,
   of long standing, perdurable, perduring, perennial, permanent,
   perpetual, persistent, persisting, plucky, potent, powerful,
   puissant, red-blooded, remaining, resistant, robust, robustious,
   robustuous, ropy, rude, rugged, sempervirent, sinewy, soldierlike,
   soldierly, sound, stable, stalwart, staying, steadfast, steely,
   stiff, stout, stouthearted, strapping, stringy, strong,
   strong as brandy, strong as strong, strong-willed, stubborn,
   sturdy, tenacious, tough, tough as leather, unfading, untiring,
   valiant, valorous, vigorous, viscid, vital, wiry



U.S. Gazetteer Counties (2000):

Hardy -- U.S. County in West Virginia
   Population (2000):    12669
   Housing Units (2000): 7115
   Land area (2000):     583.392697 sq. miles (1510.980084 sq. km)
   Water area (2000):    1.086904 sq. miles (2.815068 sq. km)
   Total area (2000):    584.479601 sq. miles (1513.795152 sq. km)
   Located within:       West Virginia (WV), FIPS 54
   Location:             39.049674 N, 78.885741 W
   Headwords:
    Hardy
    Hardy, WV
    Hardy County
    Hardy County, WV


U.S. Gazetteer Places (2000):

Hardy, NE -- U.S. village in Nebraska
   Population (2000):    179
   Housing Units (2000): 89
   Land area (2000):     0.609700 sq. miles (1.579115 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.609700 sq. miles (1.579115 sq. km)
   FIPS code:            20995
   Located within:       Nebraska (NE), FIPS 31
   Location:             40.009417 N, 97.926397 W
   ZIP Codes (1990):     68943
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Hardy, NE
    Hardy


U.S. Gazetteer Places (2000):

Hardy, AR -- U.S. city in Arkansas
   Population (2000):    578
   Housing Units (2000): 489
   Land area (2000):     2.361985 sq. miles (6.117512 sq. km)
   Water area (2000):    0.233994 sq. miles (0.606042 sq. km)
   Total area (2000):    2.595979 sq. miles (6.723554 sq. km)
   FIPS code:            29920
   Located within:       Arkansas (AR), FIPS 05
   Location:             36.320553 N, 91.480645 W
   ZIP Codes (1990):     72542
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Hardy, AR
    Hardy


U.S. Gazetteer Places (2000):

Hardy, IA -- U.S. city in Iowa
   Population (2000):    57
   Housing Units (2000): 30
   Land area (2000):     0.442085 sq. miles (1.144995 sq. km)
   Water area (2000):    0.000000 sq. miles (0.000000 sq. km)
   Total area (2000):    0.442085 sq. miles (1.144995 sq. km)
   FIPS code:            34455
   Located within:       Iowa (IA), FIPS 19
   Location:             42.810207 N, 94.051713 W
   ZIP Codes (1990):     50545
   Note: some ZIP codes may be omitted esp. for suburbs.
   Headwords:
    Hardy, IA
    Hardy