Sticky describes something that clings or adheres to whatever touches it. Honey is sticky, tape is sticky, and your hands get sticky after eating a popsicle on a hot day. That clingy, grabby quality that makes things stick together is stickiness.

The word can describe actual physical adhesion, like when tree sap makes your fingers stick together, or when a bandage stays stuck to your knee. But it also describes situations that are hard to escape or resolve. A sticky situation might be when you accidentally promise to help two different friends at the same time, and you can't figure out how to keep both commitments. The problem “sticks” to you because it's tricky to solve.

In business and marketing, people talk about sticky ideas or products that stay in your mind and keep you coming back. A catchy song is sticky because you can't stop humming it. A great book series is sticky because after finishing one book, you immediately want to read the next.

Notice how the word captures that quality of not letting go easily. Whether it's physical stickiness on your hands or mental stickiness in your thoughts, something sticky doesn't release its grip without effort.