something resembling the head of a nail that is used as an ornamental device
flattened boss on the end of nail opposite to the point
nail head的用法和样例:
例句
He would hammer a nail into the wood with a series of blows that continued to down long after the head was flush with the boards. 他老是连续不断地锤击,把钉子敲进木头,而且钉头与板面平齐之后,还是一个劲儿地敲。