Select the most appropriate meaning of the given idiom.

Weal and woe

In prosperity and adversity

The most appropriate meaning of the idiom "weal and woe" is in prosperity and adversity. This idiom means in both times of happiness and success and in times of sadness and difficulty. It is often used to describe a close relationship or a strong friendship, where the two people are there for each other through thick and thin.

The other options are not as accurate or appropriate. To say in private means to say something quietly or in a confidential manner. Willingly means to do something with pleasure or without reluctance. Agreeing together means to reach a consensus or to come to an agreement.