Antonyms of adj tightlipped

1 sense of tightlipped

Sense 1
close, closelipped, closemouthed, secretive, tightlipped -- (inclined to secrecy or reticence about divulging information; "although they knew her whereabouts her friends kept close about it")

INDIRECT (VIA uncommunicative) -> communicative, communicatory -- (able or tending to communicate; "was a communicative person and quickly told all she knew"- W.M.Thackeray)

Similarity of adj tightlipped

1 sense of tightlipped

Sense 1
close, closelipped, closemouthed, secretive, tightlipped -- (inclined to secrecy or reticence about divulging information; "although they knew her whereabouts her friends kept close about it")
       => uncommunicative (vs. communicative), incommunicative -- (not inclined to talk or give information or express opinions)