Akademik

unrelenting
I adjective adamant, austere, ceaseless, constant, continual, continuous, cruel, determined, diligent, endless, enduring, hard, immitis, implacable, incessant, inclement, indefatigable, inexorabilis, inexorable, inflexible, merciless, obdurate, perseverant, persevering, persistent, pertinacious, pitiless, relentless, remorseless, resolved, rigid, rigorous, ruthless, sedulous, severe, steadfast, stern, stubborn, tenacious, unappeasable, unbending, uncompassionate, uncompromising, undeviating, unforgiving, unmerciful, unpitying, unsoftening, unsparing, unsympathetic, unwavering, unyielding II index brutal, callous, cold-blooded, constant, cruel, dictatorial, diligent, faithful (diligent), immutable, implacable, inexorable, inflexible, ironclad, obdurate, patient, pertinacious, recalcitrant, relentless, remorseless, resolute, rigid, ruthless, sedulous, severe, unbending, uncompromising, undaunted, vindictive

Burton's Legal Thesaurus. . 2006