To paralyze means to make unable to move or act. When something is paralyzed, it becomes completely still and powerless, like a computer that freezes and won't respond to clicks or keystrokes.

In medicine, paralysis happens when nerves that control muscles stop working properly. An injury to the spine might paralyze someone's legs, meaning they can no longer walk. Sometimes paralysis is temporary: a dentist might paralyze part of your mouth with numbing medicine so you won't feel pain during a filling.

The word also describes being so overwhelmed by fear, shock, or indecision that you can't act. A student might feel paralyzed by stage fright before a presentation, frozen in place even though they know their lines. A chess player could become paralyzed by too many options, unable to choose a move. When a snowstorm paralyzes a city, traffic stops moving and businesses close because conditions make normal activity impossible.

Notice how the word captures that sense of total inability to function. Being nervous might slow you down, but being paralyzed means you're completely stuck. The paralyzing effect can come from physical injury, overwhelming emotion, or impossible circumstances.