To make them, our ancestors sharpened stone or bone tips and whittled sticks into a shaft.
为了制作它们，我们的祖先把石头或骨头尖削尖，把棍子削成一个轴。
Sharpening stone
原声例句
简单心理学
简单心理学
For example, one thing they study is hafted weapons, spears made by mounting a sharpened stone or bone onto a stick.
例如，他们研究的一件物品是用斧头武器——把锋利的石头或骨头装在棍子上制成的长矛。
学生科学报
These people left behind small, sharpened stones with pointed ends.
这些人留下了尖锐的小石头。
中文百科
磨刀石
磨刀石，又称砥砺、砺石，是一种工具。刀具经使用后刀锋易变钝，需经常在磨刀石上来回拉动磨利。其材质分有金刚石、氧化锆等等。 磨刀也属于一种技术，没有经过一定的练习，易使金属部份过度的消耗且达不到良好的锋利度。 磨刀前需先确认磨刀石为平面，因磨刀石是属于消耗品，固经常所使用的部份会凹陷，需先整面后才使用以得到预期效果。 陶瓷刀是不可以使用传统磨刀石打磨的刀类，需使用特定的机器或材料，否则将会毁损。
《山海经·西山经》已经有磨刀石的记载了。磨刀石，旧称砥砺，细者为砥，粗者为砺。磨刀石又可分为页岩、粉砂岩、砂岩等。松花石是一种磨刀石，满清八旗入关前常以松花石制成磨刀石。
英语百科
Sharpening stone 磨刀石
Sharpening stones, water stones or whetstones are used to grind and hone the edges of steel tools and implements.
Examples of items that may be sharpened with a sharpening stone include scissors, scythes, knives, razors and tools such as chisels, hand scrapers and plane blades. Though it is sometimes mistaken as a reference to the water often used to lubricate such stones, the word "whetstone" is a compound word formed with the word "whet", which means to sharpen a blade, not the word "wet". The process of using a sharpening stone is called stoning.