まい
Usage
Used to show strong negative will such as "never do such a -"
V1 / V2~~る~~ + まい (すまい、こまい)
Examples
あんなところは二度と行くまい
I'll never go to such a place again
信用していた親友が僕の秘密をもらした。絶対に許すまい
My good friend whom I trusted let my secret out. There's no way I can forgive them