1. Showing courage
   "the champion is faced with a spunky challenger";
   - feisty, plucky
    
2. Showing courage, determination and energy
   "The spunky child wasn't afraid to stand up to bullies";
   - game [informal], gamy, gamey, gritty, mettlesome, spirited

Derived forms: spunkiest, spunkier

See also: brave, courageous, spirited

Encyclopedia: Spunky