Interject is often used when someone interrupts the flow of a conversation without waiting for a pause. During the debate, she would interject with facts whenever she found a flaw in his arguments.
Pro Tip 2/3
Impoliteness Risk
Frequent interjections may be perceived as rude because they disrupt the speaker. While everyone was respectful during the panel discussion, one participant couldn't resist interjecting constantly.
Pro Tip 3/3
Emotional Emphasis
Interject can convey urgency or strong emotion when disrupting a conversation. In his excitement, he would interject with loud applause and comments.