Select the most appropriate meaning of the given idiom.

Wipe off

To clean by rubbing with cloth 

The most appropriate meaning of the idiom "wipe off" is to clean by rubbing with cloth. This idiom is often used to describe the act of removing dirt, grime, or other unwanted substances from a surface. It can also be used figuratively to describe the act of removing something from memory or from one's mind.

The other options are not as accurate or appropriate. Willingly means to do something with pleasure or without reluctance. To say in private means to say something quietly or in a confidential manner. Under impendiment means to be prevented from doing something by an obstacle or difficulty.