磨豆腐

to grumble / to chatter away incessantly

to rub / to grind / to polish / to sharpen / to wear down / to die out / to waste time / to pester / to insist

grindstone / to grind / to turn round

variant of 豆[dou4]

bean / pea / CL:棵[ke1],粒[li4] / sacrificial vessel

tofu / bean curd

decay / rotten