1. in an intense, aggressive, or violent manner
2. with great intensity or determination

Examples

• The lion defended its cubs fiercely.
• She competed fiercely in every race.
• The wind blew fiercely during the storm.
• He fiercely opposed the new policy.
• The team fought fiercely for the championship.
• She fiercely protected her family’s reputation.
• The debate was fiercely contested by both sides.