磋磨

磋磨	cuō mó	to polish and rub / (fig.) to torment; to torture / (fig.) to engage in discussion to hone an idea or skill
磋	cuō	(old) to polish bones, horns, ivory, etc into tools / (bound form) to deliberate; to consult
磨	mó	to rub / to grind / to polish / to sharpen / to wear down / to die out / to waste time / to pester / to insist
磨	mò	grindstone / to grind / to turn round