What does the word that contains the stem probably mean?

The prosecution discredited the witness by showing that she had lied in the past.

Responses

wanting and convincing others to believe the truth

to intentionally try to make others not believe

not able to believe

something that is very true and believable

The word that contains the stem "probably" in this sentence is "discredited." In this context, "discredited" means to intentionally try to make others not believe or doubt the credibility of the witness by showing that she had lied in the past.