The usage of "sic" in writing
sic is Latin (so, thus) and is used to call attention to an error in an original quote. Specifically, it is used when quoting another to say, "this is not a typographical, spelling or grammar error on the part of the reporter; rather, the error was in the original, and we're quoting it without change."
It's from the Latin sic (so, thus). Etymonline dates it back to 1887.