What's the "een" in Halloween?
late 14c., from Old French comunicacion (14c., Modern French communication), from Latin communicationem (nominative communicatio), noun of action from past participle stem of communicare "to share, divide out; communicate, impart, inform; join, unite, participate in," literally "to make common," from communis (see common (adj.)).
communication com·mu·ni·ca·tion (kə-myōō'nĭ-kā'shən)
The exchange of thoughts, messages, or information, as by speech, signals, writing, or behavior.
An opening or a connecting passage between two structures.
A joining or connecting of solid fibrous structures, such as tendons and nerves.