a.

1. 寒冷的
   The weather has been kind of nippy today, hasn't it?

   今天的天氣真的有點冷，不是嗎？

2. 銳利的；辛辣的
3. （狗等）有咬人習慣的
4. 【俚】漂亮的

adj.

1. Brit. able to move quickly; nimble.
2. (of weather) chilly.
3. Scottish & Canadian (of food) sharp-tasting; tangy.