IPA: /ˈspiːtʃləs/
KK: /ˈspitʃləs/
Not able to speak, often because of surprise or strong emotions.
She was speechless after receiving the unexpected award.
Comparative: more speechless
Superlative: most speechless
Speechless → It is formed from "speech" (from Old English *speca*, meaning the expression of thoughts and feelings through spoken words) and "-less" (meaning without). The word "speechless" means without speech or unable to speak, often due to shock or amazement.
Think of being 'without' ('-less') the ability to express your 'thoughts and feelings' ('speech') — that's why speechless means unable to speak.