Overrule

NIX

["Think of a short, informal way a president might reject a bill, often used in headlines. It starts with \"N\" and rhymes with \"mix.\""]

"Nix" is a casual term meaning to reject or put an end to something, which directly matches the idea of "overrule." It’s short and punchy, often used in phrases like "nix that idea." The word comes from German nichts (meaning "nothing"), reinforcing the sense of canceling or vetoing. Think of it as a quick, informal way to say "no" with authority.