擦掉

擦掉	cā diào	to wipe
擦	cā	to rub; to scratch / to wipe; to polish / to apply (lipstick, lotion etc) / to brush (past) / to shred (a vegetable etc)
掉	diào	to fall / to drop / to lag behind / to lose / to go missing / to reduce / fall (in prices) / to lose (value, weight etc) / to wag / to swing / to turn / to change / to exchange / to swap / to show off / to shed (hair) / (used after certain verbs to express completion, fulfillment, removal etc)