Main entry: communicative, communicatory
Definition: able or tending to communicate
Usage: was a communicative person and quickly told all she knew- W.M.Thackeray
Antonyms: uncommunicative, incommunicative
Definition: not inclined to talk or give information or express opinions
Antonyms: instrumental
Definition: relating to or designed for or performed on musical instruments
Antonyms: tight
Definition: of such close construction as to be impermeable
Antonyms: unexpansive
Definition: showing no tendency to expand
Antonyms: unsigned
Definition: lacking a signature
Antonyms: mathematical, numerical
Definition: relating to or having ability to think in or work with numbers