How do you spell Amain

Available Definitions:
1)  n. - With might; with full force; vigorously; violently; exceedingly.
2)  n. - At full speed; in great haste; also, at once.
3)  v. t. - To lower, as a sail, a yard, etc.
4)  v. i. - To lower the topsail, in token of surrender; to yield.