A hurdle is a barrier you have to get over or past, either literally or figuratively.

In track and field, hurdles are waist-high frames that runners must jump over while sprinting at full speed. Knocking down hurdles slows you down but doesn't disqualify you: you keep running. Athletes who compete in hurdling train for years to develop the rhythm and technique needed to clear these obstacles without breaking stride.

Outside of sports, we use hurdle to describe any obstacle standing between you and your goal. Learning multiplication might be the first major hurdle in math class. Before you can adopt a dog, you might need to clear several hurdles: convincing your parents, proving you're responsible, and making sure no one in your family is allergic. When scientists work on a cure for a disease, they face hurdle after hurdle: technical problems, funding challenges, and years of testing.

Notice how hurdle suggests something you can overcome with effort, unlike a wall that completely blocks your path. When you've cleared all the hurdles, you've dealt with every obstacle. The word captures an important truth: most worthwhile goals require getting past difficulties along the way. Each hurdle you clear makes you stronger and more capable of handling the next one.