Antonyms of adj taciturn

1 sense of taciturn

Sense 1
taciturn (vs. voluble) -- (habitually reserved and uncommunicative)

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")

Similarity of adj taciturn

1 sense of taciturn

Sense 1
taciturn (vs. voluble) -- (habitually reserved and uncommunicative)
       => buttoned-up -- ((British colloquial) not inclined to conversation)
       => reticent, untalkative -- (temperamentally disinclined to talk)
          Also See-> concise#1; uncommunicative#1, incommunicative#1