speak

A low class bar, a speakeasy.

Language, jargon, or terminology used uniquely in a particular environment or group.

"Corporate speak; IT speak."

Speech, conversation.

To communicate with one's voice, to say words out loud.

"I was so surprised I couldn't speak."

To have a conversation.

"It's been ages since we've spoken."

(by extension) To communicate or converse by some means other than orally, such as writing or facial expressions.

"Actions speak louder than words."