Tongue-tie, which refers to a medical condition in which the tongue is restricted in its movement, has a number of antonyms, or words with opposite meanings. One antonym is fluency, which refers to the smooth and effortless ability to speak or communicate. Another antonym is loquaciousness, which refers to being talkative and verbose. Articulateness is another antonym, which involves the ability to clearly and effectively express oneself. In contrast, muteness or silence are also antonyms for tongue-tie, which describe a lack of speech or communication ability. Additionally, garrulousness or verbosity, which refer to excessive and unnecessary talking, are also antonyms for tongue-tie.