Source : Webster's Revised Unabridged Dictionary (1913)

Fervid \Fer"vid\, a. [L. fervidus, fr. fervere. See {Fervent}.]
   1. Very hot; burning; boiling.

            The mounted sun Shot down direct his fervid rays.
                                                  --Milton.

   2. Ardent; vehement; zealous.

            The fervid wishes, holy fires.        --Parnell.
      -- {Fer"vid*ly}, adv. -- {Fer"vid*ness}, n.

Source : WordNet®

fervidness
     n : feelings of great warmth and intensity; "he spoke with great
         ardor" [syn: {ardor}, {ardour}, {fervor}, {fervour}, {fervency},
          {fire}]