verb · to fall forward or topple over

他走路不小心，猛地向前颠了一下。

verb · turned upside down or reversed in order

你把这个词的先后顺序写颠了。

verb · to shake or bump up and down during travel

这条路不平，车开起来很颠。

noun · the top or highest point, especially the apex of the head

他站在高高的山颠向下俯瞰，远处的风景尽收眼底。