What is the meaning of the idiom " To eat away"?

Finish Corrode Eating up Destroy

Corrode

The correct answer is Corrode. The other options are: Finish : The idiom for this is "to complete something." Eating up : This is a more literal meaning of the idiom, and it means to consume something completely. Destroy : This is a more extreme meaning of the idiom, and it means to completely ruin or demolish something.