What does stuttering feel like to you?

What does stuttering feel like to you? I had a severe stutter when I was younger. There were certain words I knew that I couldn’t begin with, that felt like a boulder in my brain blocking the otherwise easy words that were to follow. I knew how to say the word, I knew words lol. I could read, write, and think freely, but it felt like the part of my brain responsible for transforming thought-words into spoken words was constricted or blocked or misaligned- like there was a physical deformity somewhere; a knot in a synapses. How does/did it feel like for you?