Prefix for complaining?

[lalala]

Can anybody think of a prefix to add in front of complaining to make it an opposite?

 

[ClaudeBalls]

Uncomplaining.

 

[TheMaster]

What exactly would the opposite of complaining even -mean-? Would it be saying nothing? Complimenting? Appreciating? Anything not involving complaining?

There are no words that exactly capture the opposite, because I think what the opposite is exactly is unclear.

 

[Einstein]

Un.

 

[Nick]

not

 

[ModiS]

google.

 

[Rustang]

You mean antonym.

Just use another word like approve, be content, sanction etc