This is the 4210th most frequent Korean word.
증언에
"증언에" means "in testimony" or "in the act of testifying."
In this sentence, '증언에' (about the testimony) is used as a subject of discussion, implying that '증언' is the testimony or statement given.
법정에서 증언에 대해 논의가 진행되었다.
In the courtroom, discussions about the testimony took place.
Here, '증언에' (according to her testimony) functions as a reference for presenting details of the incident.
그녀의 증언에 따르면 사건의 전개는 다르다.
According to her testimony, the development of the incident is different.
In this example, '증언에' (towards the testimony) serves to frame the action of questioning performed by certain people.