Un·mer·ci·ful a. Not merciful; indisposed to mercy or grace; cruel; inhuman; merciless; unkind. -- Un*mer*ci*ful*ly, adv. -- Un*mer*ci*ful*ness, n.
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unmercifulness
n : inhumaneness evidenced by an unwillingness to be kind or
forgiving [syn: mercilessness] [ant: mercifulness]