屏蔽 (píng bì): to screen; to block (sth or sb); to shield; (protective) shield

This building uses special materials that can block cell phone signals, so as soon as you go inside, you can't receive calls.

To protect his privacy, he installed a special app to block those harassing calls and spam text messages.

Parents should not shut out their children's voices; instead, they should patiently listen to their ideas—only then can they communicate better.

This website is blocked, so we can't access it directly from within the country; we need to use other tools to open it.

He wears sunglasses not only for fashion but also to screen out the glaring sunlight and protect his eyes.