"Dabbles in" refers to someone who engages in a particular activity or interest casually or superficially. Its antonyms are more specific and committed actions. For instance, "devotes oneself to" denotes a high degree of involvement or dedication to a particular interest or activity. "Masters" indicates someone who has attained proficiency in a specific activity after significant practice and experience. "Specializes" refers to someone who has studied or trained in a particular area and has become an expert in that field. "Focuses on" indicates someone who is dedicated to a particular activity, topic, or interest and dedicates significant attention to it. In summary, antonyms of "dabbles in" connote higher levels of commitment, expertise, and devotion.