hold forth

• Говорить пространно, часто напыщенно или с чувством собственной важности, на определённую тему, обычно не позволяя другим прерывать.

To speak at length, often in a pompous or self-important manner, about a particular subject, typically without allowing others to interrupt.

1. Speak at lengthC1informal

   To talk about something for a long time, often in a boring or pompous way.

   Разглагольствовать

   • He held forth on the topic of politics for over an hour.
   • She held forth about her travels in Asia.
   • The professor held forth on the importance of classical education.