unrelenting persistent continual inexorable unforgiving unappeasable stern grim implacable ferocious fierce incessant ceaseless vigorous vicious brutal tenacious unceasing merciless dogged unending ruthless reckless continuing unabated strenuous severe harsh less onslaught intense slight intensifying scarce scanty unimportant few unleashed intensified ferocity waged desperation spirited paltry insignificant tactics fiercest unleashing puny midst petty escalating resurgence waging struggle frenetic aggressive littleness battles withering fueled spite barrage unprecedented frenzied little fighting provoking feverish confrontation violent pursuit extreme intensifies spurred punishing unleash prolonged least futile blitz blistering endured tactic mounting publicity ensuing sparking fight quelling sudden prowess slender ensued pounding furious forefront relentlessly daring sporadic