fort

strong; powerful; (informal) skilled, proficient, successful, sometimes translated "good" (often used in reference to academic subjects); who can count on

“Arnie est fort.” — Arnie is strong.

Inherited from Old French fort, from Latin fortem (“strong”), from Old Latin forctis, fortis.

strongly; much, a lot; very

“Alors on ferme les yeux, on a fort envie de quelque chose et on se l'offre.” — So we close our eyes, we really fancy something and we're going to take it.

Inherited from Old French fort, from Latin fortem (“strong”), from Old Latin forctis, fortis.

fort is masculine in French.

a fort

Inherited from Old French fort, from Latin fortem (“strong”), from Old Latin forctis, fortis.