noun · the sharp point or top end of an object

钢笔尖断了，没法写字了。

adjective · pointed, tapering, or sharp in shape

这支铅笔的头儿削得很尖。

adjective · high-pitched, piercing, or shrill in sound; to make one's voice shrill

她的嗓音非常尖。

adjective · the cream of the crop; the best or highest level of something

他在我们班里学习最尖。

adjective · acute, sharp, or highly sensitive (of hearing, sight, etc.)

他的耳朵很尖，连微小的声音都能听到。