trained

The word “trained” means having received instruction or practice in a particular skill. In plain terms, having learned a skill through instruction and practice.

“Trained” is pronounced traynd (/tɹeɪnd/ in IPA).

Here is “trained” used in a sentence: “She is a trained nurse with ten years of experience.”

The opposite of “trained” — its antonyms — is untrained.

“Trained” is an adjective.

“Trained” is a fairly common word in modern English.

Being trained means you have received instruction or practice in a skill. Being qualified means you have met a formal standard, such as passing exams or earning a certificate, that officially proves your ability. You can be well trained without holding a qualification, and, less usefully, qualified on paper yet out of practice.

'Trained' describes how you gained an ability, through teaching, coaching, or practice. 'Skilled' describes the ability itself, however you got it. Training usually produces skill, but someone can be naturally skilled without formal training, and freshly trained without yet being highly skilled. The words describe process versus result.

The direct opposite is 'untrained,' meaning lacking instruction or practice in a skill. Related opposites include inexperienced, unskilled, amateur, and self-taught, though self-taught people may still be highly capable. Which antonym fits depends on whether you mean no training at all or simply no formal training.