successful

The word “successful” means having achieved the intended goal or result. In plain terms, having achieved what was intended — the outcome you wanted actually happened.

“Successful” is pronounced suhk-SEHS-fuhl (/səkˈsɛs.fəl/ in IPA).

Here is “successful” used in a sentence: “The surgery was successful, and she recovered quickly.”

“Successful” is an adjective.

“Successful” is a very common word in modern English, usually learned at around the A1 level.

'Successful' means the intended goal was actually achieved — the outcome happened. 'Effective' describes something that works well and produces a strong result, but it focuses on capability rather than the final win. A method can be effective without being successful in one attempt, and success is judged by results, not just efficiency.

The direct opposite is 'unsuccessful', meaning the goal was not achieved. Related antonyms include 'failed', 'unproductive', and 'fruitless'. When describing people or businesses, 'struggling' or 'unprosperous' can also serve. The best choice depends on whether you mean a single failed attempt or an ongoing lack of achievement.

To be successful is to have reached the goal you set out to achieve, whether that is passing an exam, growing a business, or finishing a project. Success is defined by the result matching the intention. It is personal, too — people measure it differently, by wealth, happiness, recognition, or simple accomplishment.