Breathtaking describes something so beautiful, impressive, or surprising that it momentarily stops you in your tracks. The word literally suggests something that takes your breath away, like that instant when you gasp at an unexpected sight.

When you reach the top of a mountain and see valleys stretching endlessly below, or when you watch a spectacular sunset paint the sky in impossible colors, that feeling of awe is breathtaking. A gymnast's perfect routine can be breathtaking. So can a plot twist in a story you never saw coming.

The word works for both physical beauty and impressive achievements. A scientist might make a breathtaking discovery that changes how we understand the world. An artist might create a breathtaking painting that stops museum visitors mid-step. What makes something breathtaking is that it genuinely amazes you, creating that brief moment where you forget to breathe normally because you're so absorbed in what you're experiencing.

Notice that breathtaking is stronger than simply “pretty” or “nice.” It's reserved for those rare moments when something is so extraordinary that your body physically reacts to it with wonder.