资料来源 : Webster's Revised Unabridged Dictionary (1913)

Litheness \Lithe"ness\, n.
   The quality or state of being lithe; flexibility; limberness.

资料来源 : WordNet®

litheness
     n : the gracefulness of a person or animal that is flexible and
         supple [syn: {lissomeness}, {suppleness}]