1. 磨炼（技能）;开发（产品）；锤炼（观点）
If you hone something, for example a skill, technique, idea, or product, you carefully develop it over a long period of time so that it is exactly right for your purpose.

2. 磨（刀等）；把…磨快
If you hone a blade, weapon, or tool, you sharpen it on a stone or with a special device.

1. a whetstone made of fine gritstone
used for sharpening razors