[adjective] -r, -st - physically violent and frightening, or strong and powerful, or showing strong feeling, or energetic activitya fierce attacka fierce battleThe two men had been shot during fierce fighting last weekend.The cats lived wild and had become very fierce.Fierce (= Strong) winds/seas/weather prevented the race from taking place.The fire fighters had to retreat from the fierce (= strong) heat.But any expansion plans will face fierce opposition/resistance (= that showing strong feeling) from environmentalists.There is fierce (= great) competition to join the Special Branch, which investigates terrorist and political crime.(US informal) The chemistry exam was fierce (= difficult)!(US informal) I need a cold drink something fierce (= very much).
FIERCE
Meaning of FIERCE in English
Cambridge English vocab. Кембриджский английский словарь. 2012