(especially of people or animals 尤指人或动物 angry and aggressive in a way that is frightening 凶猛的；凶狠的；凶残的 a fierce dog 恶狗 Two fierce eyes glared at them. 一双凶狠的眼睛瞪着他们。 He suddenly looked fierce. 他突然面露凶相。 She spoke in a fierce whisper. 她恶狠狠地低声说话。 The more she struggled, the fiercer he became. 她越挣扎，他越凶。
(especially of actions or emotions 尤指动作或情感 showing strong feelings or a lot of activity, often in a way that is violent 狂热的；强烈的；猛烈的 fierce loyalty 极度的忠诚 the scene of fierce fighting 激烈战斗的场面 He launched a fierce attack on the Democrats. 他对民主党人发动了猛烈的攻击。 Competition from abroad became fiercer in the 1990s. 20 世纪 90 年代，来自国外的竞争加剧。 His wife is his fiercest critic. 他妻子是他最激烈的批评者。 The bill was passed despite fierce opposition. 尽管遭到强烈反对, 这个议案还是获得通过。
(of weather conditions or temperatures 天气或温度 very strong in a way that could cause damage 狂暴的；恶劣的 fierce wind 狂风 the fierce heat of the flames 火焰的炽热高温
Word OriginMiddle English: from Old French fiers ‘fierce, brave, proud’, from Latin ferus ‘untamed’.