adjective (fiercer; fiercest)
Etymology: Middle English fiers, from Anglo-French fer, fers, fiers, from Latin ferus wild, savage; akin to Greek thēr wild animal
Date: 14th century
1. violently hostile or aggressive in temperament, given to fighting or killing ; pugnacious ,
2. marked by unrestrained zeal or vehemence , extremely vexatious, disappointing, or intense , furiously active or determined , wild or menacing in appearance, fierceness noun Synonyms: see: fierce