(v) talk at length and formally about a topic, Syn. dissertate, discourse, Example:The speaker dissertated about the social politics in 18th century England
[畅所欲言 / 暢所慾言, chàng suǒ yù yánㄔㄤˋ ㄙㄨㄛˇ ㄩˋ ㄧㄢˊ] lit. fluently saying all one wants (成语 saw); to preach freely on one's favorite topic; to hold forth to one's heart's content#24170