ruth·ful /ˈruθfəl/
  Ruth·ful a. Full of ruth; as: (a) Pitiful; tender. (b) Full of sorrow; woeful. (c) Causing sorrow.   --  Ruth*ful*ly, adv.
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  ruthful
       adj : feeling or expressing pain or sorrow for sins or offenses
             [syn: contrite, remorseful, rueful, sorry]