nailhead

例句：

1. 1. The nailhead was so sharp that it could easily pierce through the fabric.
   这个钉子头太锋利了，很容易穿透布料。
2. 2. The carpenter carefully removed the nailhead before starting to work on the wooden frame.
   木匠在开始工作之前小心地移除了钉子头。
3. 3.The nailhead had been embedded in the wood for too long and needed to be removed before further work could be done.
   这个钉子头已经嵌入木头太久了，需要先移除才能进行进一步的工作。