fierce

marked by extreme and violent energy; "a ferocious beating"; "fierce fighting"; "a furious battle"

marked by extreme intensity of emotions or convictions; inclined to react violently; fervid; "fierce loyalty"; "in a tearing rage"; "vehement dislike"; "violent passions"

ruthless in competition; "cutthroat competition"; "bowelless readiness to take advantage"

violently agitated and turbulent; "boisterous winds and waves"; "the fierce thunders roar me their music"- Ezra Pound; "rough weather"; "rough seas"