competent
Having enough skill and knowledge to do something well.
Competent means having the skills and knowledge needed to do something well. A competent swimmer can handle deep water safely. A competent carpenter builds sturdy furniture that won't fall apart. When someone is competent at their job, they know what they're doing and can be trusted to do it correctly.
Being competent doesn't mean being the absolute best or most talented. It means being good enough to handle the task reliably. A competent soccer player understands the rules, has practiced the basic skills, and contributes to their team. They might not score every goal, but their teammates can count on them.
You might hear someone say a doctor is professionally competent or that a student is competent in math. The word suggests solid, dependable ability. When you're competent at something, you've moved beyond stumbling through it as a beginner. You understand what you're doing and can produce good results consistently.
The opposite of competent is incompetent, meaning lacking the necessary skills or knowledge. If a babysitter is incompetent, parents won't trust them with their children. Being competent at the things that matter in your life, whether it's schoolwork, friendship, or responsibilities at home, gives both you and others confidence that you can handle what comes your way.