MDBG Mobile Chinese English Dictionary (iPhone, Android, Windows Phone)

久负盛名	jiǔ fù shèng míng	seasoned / honed to perfection over centuries / special reserve
养精蓄锐	yǎng jīng xù ruì	to preserve and nurture one's spirit (idiom); honing one's strength for the big push
锤炼	chuí liàn	to forge (metal); (fig.) to toughen sb up; to hone (one's skills)
磨刀石	mó dāo shí	whetstone (for honing knives)
磨刀	mó dāo	to hone (a knife)
砥砺	dǐ lì	whetstone / (lit. and fig.) to hone; to sharpen / to encourage
钻牛角	zuān niú jiǎo	lit. honing a bull's horn; fig. to waste time on an insoluble or insignificant problem / to bash one's head against a brick wall / a wild goose chase / a blind alley / to split hairs / same as idiom 钻牛角尖
细磨刀石	xì mò dāo shí	whetstone (for honing knives)
磋磨	cuō mó	to polish and rub / (fig.) to torment; to torture / (fig.) to engage in discussion to hone an idea or skill