allô

Etymology
From.

Interjection

 * 1)  hello (when answering at the beginning of a call)
 * 2)  used to confirm that the person being addressed is listening, or to confirm if anyone is listening
 * 3)  hello (as a in-person greeting)
 * 4)  hello! (implying someone is not paying attention to the obvious)
 * 1)  hello! (implying someone is not paying attention to the obvious)

Usage notes

 * Using "allô" as a greeting is normal in Quebec and Louisiana, but particularly rude in Europe, where it should be avoided.