1. in a fierce, violent, or aggressive manner
2. with intense energy, determination, or passion

Examples

• The dog barked ferociously at the stranger.
• She defended her position ferociously during the debate.
• The storm raged ferociously through the night.
• He attacked the problem ferociously, determined to find a solution.
• The lion roared ferociously to protect its territory.
• The team competed ferociously for the championship title.