Explanation:

- Overrun means to spread over or occupy a place in large numbers. It often carries a sense of invasion or excessive presence.

- Option 1: Surrender - This means to give up or yield control. It's the most suitable antonym since it implies ceasing to invade or dominate, which is the opposite of overrun.

- Option 2: Inundate - It means to flood or overwhelm. This is similar to overrun, not an antonym.

- Option 3: Storm - It refers to attack or capture by force. This is similar to overrun.

- Option 4: Invade - It means to enter forcefully, very similar to overrun in context.