com·mu·ni·cate / kəˈmyoōnəˌkāt/ • v. 1. [intr.] share or exchange information, news, or ideas. ∎  [tr.] impart or pass on (information, news, or ideas): he communicated his findings to the inspector. ∎  [tr.] convey or transmit (an emotion or feeling) in a nonverbal way. ∎  succeed in conveying one's ideas or in evoking understanding in others: the ability to communicate. ∎  (of two people) be able to share and understand each other's thoughts and feelings. ∎  [tr.] (usu. be communicated) pass on (an infectious disease) to another person or animal. ∎  [tr.] transmit (heat or motion). ∎  [often as adj.] (communicating) (of two rooms) have a common connecting door.2. [intr.] Christian Church receive Holy Communion.DERIVATIVES: com·mu·ni·ca·tor / -ˌkātər/ n.com·mu·ni·ca·to·ry / -kəˌtôrē/ adj.

communicate give a share of, share in; receive, administer Holy Communion; hold intercourse with XVI; have a common channel of passage XVIII. f. pp. stem of L. commūnicāre, f. commūnis COMMON; see -ATE 3.
So communication, communicative XIV.