How to remove a word from the English word Aspell

Question

When I check my texts with aspell(with an English dictionary), the word " froward " is accepted (because it is a real English word ). However, I never use it, so in my texts " froward " is always a " forward " error . So I want to aspellreject froward . "

How to remove a word from the standard dictionary? Is there a way to create a blacklist of words? It is not possible to mark it in .aspell.en.pwsbecause the personal dict contains only the whitelist.