User-friendly describes something designed to be easy to understand and use, even for people who've never tried it before. A user-friendly app has clear buttons and simple instructions. A user-friendly board game explains its rules in plain language without confusing jargon.

Early computers required users to memorize complicated commands and codes, but user-friendly software let people click on pictures and menus instead. Today, we call anything user-friendly when it's been designed with the user's experience in mind: a user-friendly bicycle has a comfortable seat and easy-to-reach handlebars, while a user-friendly textbook explains concepts clearly with helpful diagrams.

The opposite of user-friendly might be confusing, complicated, or frustrating to use. When inventors and designers create something user-friendly, they're thinking about real people trying to accomplish something. They anticipate where users might get stuck and smooth those rough edges away. A user-friendly product respects your time and intelligence by making things obvious instead of mysterious.