D defs.my
Entry 1 sense Webster, 1913

Unmerciful

/ən-mẽrs'-ĭf-əl/ · Un·mer·ci·ful · IPA /ʌnˈmɝsɪfl̩/
01 a. Not merciful; indisposed to mercy or grace; cruel; inhuman; merciless; unkind.
  1. 1.
    Not merciful; indisposed to mercy or grace; cruel; inhuman; merciless; unkind.