How not to freeze program when playing pyttsx3 speech?

Question

speech synthesis

I was making a program using pyttsx3 for text-to-speech synthesis in Python and ran into one problem.
When a voice is played, the engine.runAndWait()program is frozen, and nothing can be pressed in it. How can this problem be solved? I tried to use multithreading but gave an error (I showed it in my last question)