windy本身就是形容词形式。
windy：adj.多风的；风大的；当风的；受大风吹的；夸夸其谈的；空话连篇的；空洞无物的；
比较级： windier最高级： windiest
相关介绍
It's very windy and dusty here in winter.
这里冬天风沙很大。
It is a windy day today.
今天风很大。
It looks as if it'll be windy tomorrow.
似乎明天要起风。
Leaves collect in heaps on windy days.
刮风的日子落叶积聚成堆。
