An Etymological Dictionary of Astronomy and Astrophysics

1a) To impart knowledge of; make known.

1b) To give to another; impart; transmit (as a disease).

2a) To give or interchange thoughts, feelings, information, or the like, by writing, speaking, etc.

2b) To express thoughts, feelings, or information easily or effectively (Dictionary.com).

Etymology (EN): From L. communicatus, p.p. of communicare
“to share, divide out; impart; inform; join, participate in,” literally “to make common,” from communis, → common.

Etymology (PE): Hamdârgandan, literally “to diffuse to the public,” from hamdâr, → common, + gan, variant kan “to throw, diffuse” (as in parâgan-, parâgandan “to diffuse, disperse, scatter;” afgandan “to throw; to lay, place;” kandan “to dig; to extract”), from Proto-Ir. *kan- “to throw, place, put, disperse, → scatter” + -dan infinitive suffix.