high-spirited

from WordNet (r) 3.0 (2006)

high-spirited
    adj 1: joyously unrestrained [syn: {ebullient}, {exuberant},
           {high-spirited}]

from The Collaborative International Dictionary of English v.0.48

High-spirited \High"-spir`it*ed\, a.
   Full of spirit or natural fire; haughty; courageous;
   impetuous; not brooking restraint or opposition.
   [1913 Webster]