D defs.my
Entry 2 senses Webster, 1913

halfhearted

/(-härt`ĕd)/ · half·heart·ed · IPA /hˈæfhˌɑrtɪd/
01 a. Wanting in heart or spirit; ungenerous; unkind.
  1. 1.
    Wanting in heart or spirit; ungenerous; unkind.
  2. 2.
    Lacking zeal or courage; performed with less than a full effort; lukewarm; unenthusiastic; as, a half-hearted attempt; -- of actions.