crowd的形容词为crowded它的反义词是uncrowded， uncrowded的中文意思是adj. 宽敞的不拥挤的

It's relatively clean and uncrowded， and a good choice for most visitors to India.比较干净、也不拥挤、适合大多数来印度的游客。

You should give others their personal space in an uncrowded elevator.