IPA: /ˈtʌŋləs/
KK: /ˈtʌŋləs/
Describing someone or something that does not have a tongue or is unable to speak.
The character in the story was tongueless, unable to express his thoughts verbally.
Tongueless → It is formed from "tongue" (from Old English "tunge", meaning the organ of speech) and "-less" (meaning without). The word "tongueless" means without a tongue, or lacking the ability to speak.
Imagine someone who is 'without' ('-less') their 'organ of speech' ('tongue') — that's why tongueless means unable to speak.