Antonyms of adj voluble

1 sense of voluble

Sense 1
voluble (vs. taciturn) -- (marked by a ready flow of speech; "she is an extremely voluble young woman who engages in soliloquies not conversations")

taciturn (vs. voluble) -- (habitually reserved and uncommunicative)
        => buttoned-up -- ((British colloquial) not inclined to conversation)
        => reticent, untalkative -- (temperamentally disinclined to talk)

Similarity of adj voluble

1 sense of voluble

Sense 1
voluble (vs. taciturn) -- (marked by a ready flow of speech; "she is an extremely voluble young woman who engages in soliloquies not conversations")
       => chatty, gabby, garrulous, loquacious, talkative, talky -- (full of trivial conversation; "kept from her housework by gabby neighbors")
          Also See-> communicative#2, communicatory#1; prolix#1