Main entry: responsive
Definition: readily reacting or replying to people or events or stimuli; showing emotion
Usage: children are often the quickest and most responsive members of the audience
Antonyms: unresponsive
Definition: not responding to some influence or stimulus
Main entry: reactive, responsive
Definition: reacting to a stimulus
Usage: the skin of old persons is less reactive than that of younger persons
Antonyms: insensitive
Definition: not responsive to physical stimuli
Antonyms: insensitive
Definition: deficient in human sensibility; not mentally or morally sensitive