1. having a violent and unrestrained nature; showing aggression or anger
2. very intense or extreme in degree
3. showing strong determination or competitive spirit

Examples

• The fierce lion defended its territory from intruders.
• She gave him a fierce look when he interrupted her presentation.
• The fierce storm knocked down several trees in the neighborhood.
• There was fierce competition for the scholarship among students.
• The fierce heat made it difficult to work outside.
• He showed fierce loyalty to his friends throughout the crisis.
• The fierce debate lasted for hours without resolution.