Definitions

1. verb

to make someone feel fierce or full of fierce determination

“The coach tried to fiercen her teammates before the big game.”

2. verb

to intensify or increase the strength or severity of something

“The storm fiercen its attack on the coastline, causing widespread damage.”

3. noun

an instance of making someone feel fierce or full of fierce determination

“The fiercen in her eyes was a sign of her determination to succeed.”