perfect, steel, razor blade, sharpening stone, whetstone, sharpener, honing steel, grindstone, razor, shave, more...

dull, blunt, unsharpened

oilstone, waterstone, ceramic stone, diamond stone, steel, more...

fine, temporal, new, frontal, old, small, hyoid, belgian, late, occipital, white

improve a skill,   to perfect,   strop a razor,   develop skills,   to sharpen,   improve skills,   sharpen, as a knife,   sharpen a blade,   improve skill,   sharpen skills