Antonyms of adj silver-tongued

1 sense of silver-tongued

Sense 1
eloquent, facile, fluent, silver, silver-tongued, smooth-spoken -- (expressing yourself readily, clearly, effectively; "able to dazzle with his facile tongue"; "silver speech")

INDIRECT (VIA articulate) -> inarticulate, unarticulate -- (without or deprived of the use of speech or words; "inarticulate beasts"; "remained stupidly inarticulate and saying something noncommittal"; "inarticulate with rage"; "an inarticulate cry")

Similarity of adj silver-tongued

1 sense of silver-tongued

Sense 1
eloquent, facile, fluent, silver, silver-tongued, smooth-spoken -- (expressing yourself readily, clearly, effectively; "able to dazzle with his facile tongue"; "silver speech")
       => articulate (vs. inarticulate) -- (expressing yourself easily or characterized by clear expressive language; "articulate speech"; "an articulate orator"; "articulate beings")