WordWeb Online

1. Being in a tense state
   "nervy parents are sensitive themselves";
   - edgy, high-strung, highly strung, jittery, jumpy, overstrung, restive, uptight [informal], squirrelly [N. Amer, informal]
    
2. Showing or requiring courage and contempt of danger
   "the nervy feats of mountaineers"
    
3. [N. Amer, informal] Offensively bold
   "a nervy thing to say";
   - brash, cheeky

Derived forms: nervier, nerviest

See also: bold, forward, tense