unsparing

adj

1. liberal, profuse, lavish, rich, ample, copious, abundant; bountiful, plentiful, luxuriant; extensive, broad, wide, far-reaching, wide-ranging; wholesale, sweeping, large-scale; ungrudging, giving, unstinting, unstinted, open-handed; generous, beneficent, munificent, magnanimous, big-hearted; excessive, immoderate, extravagant, extreme, inordinate, outrageous; ballooning, inflated, mushrooming, spreading, widespread; unbounded, limitless, unrestricted; vast, huge, enormous, gigantic, giant, titanic, colossal, mammoth, gargantuan; total, full, free, unqualified, unchecked, unending.

2. unmerciful, merciless, unrelenting, relentless, unremitting, inexorable, implacable, uncompromising, unbending, inflexible, obdurate; pitiless, ruthless, cruel, harsh, uncompassionate, unfeeling; severe, rigorous, grim, austere, stern, stark, stringent; hard-hearted, hard-boiled, cold, cold-blooded, iron-handed, iron-fisted, iron-hearted; diligent, assiduous, persevering, untiring, dogged, leaving no stone unturned; persistent, determined, obstinate, adamant.