Source : Webster's Revised Unabridged Dictionary (1913)

Nervy \Nerv"y\, a. [Compar. {Nervier}; superl. - {iest}.]
   Strong; sinewy. ``His nervy knees.'' --Keats.

Source : WordNet®

nervy
     adj 1: being in a tense state [syn: {edgy}, {high-strung}, {highly
            strung}, {in suspense(p)}, {jittery}, {jumpy}, {overstrung},
             {restive}, {uptight}]
     2: showing or requiring courage and contempt of danger; "the
        nervy feats of mountaineers"
     3: offensively bold; "a brash newcomer disputed the age-old
        rules for admission to the club"; "a nervy thing to say"
        [syn: {brash}, {cheeky}]
     [also: {nerviest}, {nervier}]