B2physically violent and frightening: a fierce attack/battleTwo men were shot during fierce fighting last weekend.Violent or aggressiveUnkind, cruel and unfeelingTreating people or animals badlyB2strong and powerful: Fierce winds/seas prevented the race from taking place.Fire fighters had to retreat from the fierce heat.Physically strong and powerfulB2showing strong feeling or energetic activity: The expansion plans will face fierce opposition/resistance from environmentalists.There is fierce competition to join the Special Branch.Energetic and livelyStrong feelings›USinformaldifficult: The chemistry exam was fierce!Complicated and difficult to doDifficult to understandfierceness
/-nəs/noun[U]Violent or aggressiveUnkind, cruel and unfeelingTreating people or animals badlyDifficult things and peoplePreventing and impeding