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

Heartedness \Heart"ed*ness\, n.
   Earnestness; sincerity; heartiness. [R.] --Clarendon.

   Note: See also the Note under {Hearted}. The analysis of the
         compounds gives hard-hearted + -ness, rather than hard
         + heartedness, etc.