The Collaborative International Dictionary of English v.0.48:

Heartily \Heart"i*ly\ (h[aum]rt"[i^]*l[y^]), adv. [From
   Hearty.]
   1. From the heart; with all the heart; with sincerity.
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            I heartily forgive them.              --Shak.
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   2. With zeal; actively; vigorously; willingly; cordially; as,
      he heartily assisted the prince.
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   To eat heartily, to eat freely and with relish. --Addison.

   Syn: Sincerely; cordially; zealously; vigorously; actively;
        warmly; eagerly; ardently; earnestly.
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