köken: Inherited from Middle French and Old French vert, from Vulgar Latin virdis, syncopated from Classical Latin viridis. Compare Italian, Portuguese, and Spanish verde. The Old French -t is due to regular final devoicing. The feminine was originally also vert and was extended with -e only during Middle French times, thus keeping the devoiced sound.
aile: algue verte, béret vert, carte verte, chêne vert, chou vert et vert chou, citron vert, classe verte, en dire des vertes et des pas mûres, énergie verte, fée verte