French Adjectives Ending in -f

French adjectives ending in -f form the feminine by replacing -f with -ve: actif → active, neuf → neuve, sportif → sportive. The plural adds a regular -s: actifs, actives.

actif / active active
agressif / agressive aggressive
approximatif / approximative approximate, rough
bref / brève brief, short
juif / juive Jewish
naïf / naïve naive
nocif / nocive harmful, noxious
neuf / neuve new, brand-new
positif / positive positive
veuf / veuve widowed
vif / vive lively, sharp, vivid