IPA: /ˈspiːtʃləsnəs/
KK: /ˈspiːtʃləsnəs/
The condition of being unable to speak, often due to shock, surprise, or strong emotion.
After hearing the unexpected news, she was left in a state of speechlessness.
Speechlessness → It is formed from "speech" (from Old English *speca*, meaning the expression of thoughts and feelings through spoken words) and "-lessness" (meaning without). The word "speechlessness" means the state of being without speech or unable to speak.
Think of being 'without' ('-lessness') the ability to 'express thoughts' ('speech') — that's what speechlessness means.