Tep"id*ness

from The Collaborative International Dictionary of English v.0.48

Tepid \Tep"id\, a. [L. tepidus, fr. tepere to be warm; akin to
   Skr. tap to be warm, tapas heat.]
   Moderately warm; lukewarm; as, a tepid bath; tepid rays;
   tepid vapors. -- {Tep"id*ness}, n.
   [1913 Webster]