adjective, fierc·er, fierc·est.
Origin of fierce
Examples from the Web for fiercely
With twice as many British soldiers, Washington was in for a fiercely competitive battle of wit and strength.The British Royals Reinvade Brooklyn: William and Kate Come Watch Basketball on Historic Battle Site|Justin Jones|December 6, 2014|DAILY BEAST
In the case of Wikipedia, its defenders were fiercely committed.
Fiercely proud of her heritage, she deplores the racial prejudice she encountered when she came to Hollywood at age 17.Rita Moreno, SAG Life Achievement Award Winner, Talks Brando, Elvis And West Side Story|Sandra McElwaine|January 15, 2014|DAILY BEAST
Middleton also says in her piece that she, like the rest of her family, is "fiercely competitive."Pippa Middleton's Crush on Princess Diana's Boyfriend|Tom Sykes|January 10, 2014|DAILY BEAST
Winstead admits she was a tough boss, maybe too tough, inexperienced in delegating and fiercely protective of her vision.'Daily Show' Creator Lizz Winstead Is the Queen of Calling Bullshit|Caitlin Dickson|December 23, 2013|DAILY BEAST
Then turning upon the Englishman, he said fiercely: "What have you come here for?"From Sea to Sea|Rudyard Kipling
"The Shepherdess has asked for witnesses, and she shall have them," answered Olfan fiercely.The People Of The Mist|H. Rider Haggard
He cast a viper's glance at the man who had unmasked him, and seized him fiercely by the arm.The Gold-Seekers|Gustave Aimard
"You may be very sure I shan't, sir," said the Baronet, fiercely.The Tenants of Malory|Joseph Sheridan Le Fanu
The fellow took it like a man in a daze—the daze of a slowly and fiercely solidifying resolution.
Word Origin for fierce
mid-13c., "proud, noble, bold," from Old French fers, nominative form of fer, fier "strong, overwhelming, violent, fierce, wild; proud, mighty, great, impressive" (Modern French fier "proud, haughty"), from Latin ferus "wild, untamed," from PIE root *ghwer- "wild, wild animal" (cf. Greek ther, Old Church Slavonic zveri, Lithuanian zveris "wild beast").
Original English sense of "brave, proud" died out 16c., but caused the word at first to be commonly used as an epithet, which accounts for the rare instance of a French word entering English in the nominative case. Meaning "ferocious, wild, savage" is from c.1300. Related: Fiercely; fierceness.