"fiercely want" is correct and usable in written English
You can use it to describe an intense feeling of desire or longing for something. For example: He fiercely wanted to get the job and put his all into the interview.
"We fiercely want to be independent," he said.
For religious and social reasons, blacks fiercely want to have a respectable funeral, Mr. Jaynes said, and preachers often refer to burial as a homecoming.
But limiting tax increases to just a small fraction of households might mean raising too little revenue over the long term to finance the programs that Democrats also fiercely want to preserve — Social Security, Medicaid and Medicare, education, supports for lower-income working families and infrastructure, among others, some policy experts on the left say.
Delaying the process risks creating even more economic instability, and the will of 17 million people who fiercely want to see Brexit happen and were thrilled by the result.
She fiercely wanted something beyond her reach, which she could not obtain, and he could not help her.
Set off from most of Old Saybrook by a causeway and looking more like Nantucket than Connecticut with its cedar-shingled beach homes, it was a place where Miss Hepburn could get the privacy she fiercely wanted.
Others -- including her parents, Bob and Mary Schindler, and her siblings -- contend that she fiercely wants to live -- and that even if she did not, life in any form is worth holding onto.
With the birth of her son's son, says Kerr, came the realisation that - though she fiercely wants to live long - she may never see this boy go to university.
When a story stands out, as does ZZ Packer's "Every Tongue Shall Confess" (in "Best American"), the character it's about -- in this case, a cross-eyed evangelical choir leader -- fiercely wants things and therefore acts and comes across as distinctive and alive.
The producer Julie Snyder, in a phone call, also talked about novels and short stories, pointing out that early in the podcast, McLemore, fiercely wanting Reed and his audience to understand this world, gives Reed a copy of Faulkner's "A Rose for Emily".
I know how fiercely I want and love, and how much it can hurt to love someone.
