淘汰

淘汰	táo tài	to wash out / (fig.) to cull / to weed out / to eliminate / to die out / to phase out
淘	táo	to wash (rice, sand etc in water to remove impurities) / to dredge; to scoop out (sediment or waste) / (dialect) to hunt for and buy (bargains or second-hand goods) / (dialect) naughty; mischievous
汰	tài	to discard / to eliminate