Antonyms of adj smooth-tongued

1 sense of smooth-tongued

Sense 1
glib, glib-tongued, smooth-tongued -- (artfully persuasive in speech; "a glib tongue"; "a smooth-tongued hypocrite")

INDIRECT (VIA persuasive) -> dissuasive -- (deterring from action; "dissuasive advice"; "made a slight dissuasive gesture with her hand")

Similarity of adj smooth-tongued

1 sense of smooth-tongued

Sense 1
glib, glib-tongued, smooth-tongued -- (artfully persuasive in speech; "a glib tongue"; "a smooth-tongued hypocrite")
       => persuasive (vs. dissuasive) -- (intended or having the power to induce action or belief; "persuasive eloquence"; "a most persuasive speaker"; "a persuasive argument")