Irregular French Adjectives

aigu / aiguë high-pitched, sharp, acute
bénin / bénigne benign
favori / favorite favourite
frais / fraîche
frais / fraîches
cool, chilly, fresh
long / longue long
malin / maligne clever, malignant (medical)
oblong / oblongue oblong
vieux / vieille
vieux / vieilles
old