fierce
1. [ adjective ] marked by extreme and violent energy
Synonyms: furious ferocious savage
Examples:

"a ferocious beating" "fierce fighting" "a furious battle"

Related terms: violent
2. [ adjective ] marked by extreme intensity of emotions or convictions; inclined to react violently; fervid
Synonyms: vehement trigger-happy violent tearing
Examples:

"fierce loyalty" "in a tearing rage" "vehement dislike" "violent passions"

Related terms: intense
3. [ adjective ] ruthless in competition
Synonyms: bowelless cutthroat
Examples:

"cutthroat competition" "bowelless readiness to take advantage"

Related terms: merciless
4. [ adjective ] violently agitated and turbulent
Synonyms: rough boisterous
Examples:

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

Related terms: stormy