Antonyms of adj untalkative

1 sense of untalkative

Sense 1
reticent, untalkative -- (temperamentally disinclined to talk)

INDIRECT (VIA taciturn) -> voluble -- (marked by a ready flow of speech; "she is an extremely voluble young woman who engages in soliloquies not conversations")

Similarity of adj untalkative

1 sense of untalkative

Sense 1
reticent, untalkative -- (temperamentally disinclined to talk)
       => taciturn (vs. voluble) -- (habitually reserved and uncommunicative)