blocker
/ˈblɑkər/
noun
- A person or thing that prevents movement, progress, or action.
- A pop-up ad blocker can make browsing the web much faster.
- The fallen boulder was a huge blocker on the hiking trail.
- In football, the offensive lineman is a key blocker for the runner.
- A substance or device that stops something from passing through.
- The pipe's clog was a stubborn blocker of water flow.
- She uses a sunscreen that is a strong UV blocker.
- A noise blocker can help you sleep in a loud city.