The phrase "a terrible fever" is correct and usable in written English.
You can use it when describing a high or severe body temperature due to illness.
Example: "After feeling unwell for a few days, she finally went to the doctor, who diagnosed her with a terrible fever."
Alternatives: "a high fever" or "a severe fever."
At 3.04am my four-year-old son woke in a terrible fever.
Later, it will all seem like a terrible fever dream, but at the time it moved so very slowly, felt so very concrete.
"I was on for two or three weeks," she told The Easthampton Star in 1985, "and one night I had a terrible fever, a flu".
Four years ago, in Havana, I watched him make moves in the pas de deux from Diana and Acteon almost beyond comprehension – he seemed to be spinning while hovering upside-down – while his partner, suffering a terrible fever but still determined to dance, swooned and was carted off in an ambulance.
A perfectly healthy baby boy who then developed a terrible fever and everything suddenly went haywire.
I had suffered from Mastitis and a terrible fever (let alone an all-over agonizing ache in my body which comes from delivering a baby).
See, she's had a hard time, you wouldn't ever have expected a man like him — they just went on a holiday somewhere and he got something, like some bug that gave him a terrible high fever?
See, she's had a hard time, you wouldn't ever have expected a man like him they just went on a holiday somewhere and he got something, like some bug that gave him a terrible high fever?
Three months before Simon Martin bought his wife a parrot for Christmas, de Kruif issued a warning in the lead article of Ladies Home Journall: "In American milk today there lurks a terrible, wasting fever, that may keep you in bed for a couple of weeks, that may fasten itself on you for one, or for two, or even for seven years — that might culminate by killing you".
"The symptoms are always the same - dry throat, dizziness, terrible fever and severe headache".
When the guileless young American took her fateful stroll by moonlight in the Colosseum, she ignored warnings and died a few days later of "a terrible case of the fever".
