What does the word part contra mean?

Answer + Explanation:

Apostrophe means a punctuation mark, and sometimes a diacritical mark, in languages that use the Latin alphabet and some other alphabets as well as a punctuation mark ( ’ ) used to indicate either possession (e.g., Harry's book; boys' coats) or the omission of letters or numbers (e.g., can't; he's; class of ’99).

I think that Edwards is merely addressing his audience when he says O Sinner! since from the context of what "Sinners in the Hand of An Angry God" and what the word apostrophe means that if there was an apostrophe before the s that would mean that the sinner would be in possession of the hand of an angry god, but because this is a sermon that we're talking about, Edwards is talking to his audience about sinners.

Side Note:

I hope this helped in any or some way.