Source : Webster's Revised Unabridged Dictionary (1913)

Steadfastness \Stead"fast*ness\, n.
   The quality or state of being steadfast; firmness; fixedness;
   constancy. ``The steadfastness of your faith.'' --Col. ii. 5.

         To prove her wifehood and her steadfastness. --Chaucer.

Source : WordNet®

steadfastness
     n 1: loyalty in the face of trouble and difficulty [syn: {staunchness}]
     2: steadfast resolution