All, or certainly most, of my teachers kept on telling us to say if we didn't understand what they were on about. They were not being patronising. It's OK not to understand and not to be understood. It's also OK to say you don't understand and to say that you think someone hasn't understood you.
Isn't it? 
It always has been in my world.
Alphabetical Girls' and Boys' Names Oct '25
Your own body reminding you of lost loved ones



that's interesting!' (My children rumbled that one years ago!)