unmerciful

adjective un·mer·ci·ful \ˌən-ˈmər-si-fəl\

: not having or showing any mercy : very harsh or cruel

Full Definition of UNMERCIFUL

: not merciful : merciless

: excessive, extreme <chatted for an unmerciful length of time>

— un·mer·ci·ful·ly \-f(ə-)lē\ adverb

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14th century

Synonyms: baroque, devilish, exorbitant, extravagant, extreme, fancy, immoderate, inordinate, insane, intolerable, lavish, overdue, overextravagant, overmuch, overweening, plethoric, steep, stiff, towering, unconscionable, undue, excessive

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