"Mastered" Natural Recordings by Native Speakers
Mastered refers to having acquired complete control, skill, or knowledge of something, often as a result of extensive practice, training, or experience. It implies a high level of proficiency, competence, or expertise, and is often used to describe achievements or accomplishments in a particular area, such as a language, a musical instrument, or a sport. For example, "She has mastered the piano" or "He has mastered three languages".