verb · to join or fix objects in place using nails, pins, or staples

请把这张通知钉在布告栏上。

noun · a small metal spike used for fastening or hanging things

木板松了，他找来一颗长钉，用力将其敲进了木头里。

verb · to follow someone closely or keep them under surveillance

警察一直在后面钉着他。

verb · to keep at someone or press them to finish a task

妈妈钉着他做作业。

verb · to attach something, such as a button, to fabric using a needle and thread

她在帮我钉掉落的纽扣。