The Collaborative International Dictionary of English v.0.48:

Innerve \In*nerve"\ ([i^]n*n[~e]rv"), v. t. [imp. & p. p.
   Innerved ([i^]n*n[~e]rvd"); p. pr. & vb. n. Innerving.]
   [Pref. in- in + nerve.]
   To give nervous energy or power to; to give increased energy,
   force, or courage to; to invigorate; to stimulate.
   [1913 Webster]