1. superlative form of fierce; most violent, intense, or aggressive
Usage: superlative form
2. most determined or passionate in effort or feeling
Usage: superlative form

Examples

• The lion was the fiercest predator in the jungle.
• She faced her fiercest competition in the championship match.
• The storm brought the fiercest winds we had seen all year.
• He was known as the fiercest warrior in the kingdom.
• The debate sparked the fiercest argument between the candidates.
• Winter brought the fiercest cold the region had experienced in decades.