furieusement

furiously, fiercely, terribly

f y . ʁ j ø z . m ɑ̃
furieuse Feminine singular + ment forms manner adverbs and action/result nouns
adverb Rare #43,315
furiously, fiercely, terribly Often used informally as an intensifier meaning “very” (like “terribly” in English).
FR: Il fait furieusement froid ce matin.
EN: It’s terribly cold this morning.

J'en ai furieusement envie.

I really want it.

— Le Salaire de la peur (1953)

Elle réagit furieusement.

She reacts furiously.

Keiko étudie furieusement.

Keiko studies furiously.

Il a réagi furieusement.

He reacted furiously.