Un*wea"ried*ness

from The Collaborative International Dictionary of English v.0.48

Unwearied \Un*wea"ried\, a.
   Not wearied; not fatigued or tired; hence, persistent; not
   tiring or wearying; indefatigable. -- {Un*wea"ried*ly}, adv.
   -- {Un*wea"ried*ness}, n.
   [1913 Webster]