fierce

adjectives

marked by extreme and violent energy
"a ferocious beating"; "fierce fighting"; "a furious battle"
ferocious, fierce, furious, savage
is derived from
fierceness
marked by extreme intensity of emotions or convictions; inclined to react violently; fervid
"fierce loyalty"; "in a tearing rage"; "vehement dislike"; "violent passions"
fierce, tearing, trigger-happy, vehement, violent
is derived from
fierceness
ruthless in competition
"cutthroat competition"; "bowelless readiness to take advantage"
bowelless, cutthroat, fierce
is derived from
fierceness
violently agitated and turbulent
"boisterous winds and waves"; "the fierce thunders roar me their music"- Ezra Pound; "rough weather"; "rough seas"
boisterous, fierce, rough
is derived from
fierceness