fiercely

adverb

fierce·​ly ˈfirs-lē 

1

: in a fierce or vehement manner

fiercely competitive

2

: to a high degree : very

fiercely expensive

Synonyms of fiercely

• extremely
• very
• incredibly
• terribly
• highly
• too
• desperately
• intensely
• damned
• so
• badly
• damn
• severely
• really
• wildly
• seriously
• heavily
• far
• most
• greatly

Examples of fiercely in a Sentence

fiercely hot weather

Recent Examples on the Web

But surely the ultimate humiliation is that some people in Australia, one of the most tribal and fiercely one-eyed nations in world sport, are sympathetic towards England’s plight. —Tim Spiers, New York Times, 21 Dec. 2025

The move is a win for the UAE’s most populous emirate, which is competing fiercely with Abu Dhabi and Riyadh for global financial hub status. —Kelsey Warner, semafor.com, 19 Dec. 2025

European Union leaders are set to review on Thursday proposals aimed at using proceeds from immobilized Russian sovereign assets to support Ukraine’s huge budget and defence needs — something Moscow fiercely opposes. —Reuters, NBC news, 17 Dec. 2025

Despite not getting a vote on ObamaCare subsidies extension as part of the GOP health care package, moderates are resisting hard-line tactics that could sink the GOP health care bill or more fiercely defy Republican leadership. —Emily Brooks, The Hill, 16 Dec. 2025

Word History

First Known Use

14th century, in the meaning defined at sense 1