The term "most devotedly" implies an intense level of commitment, dedication, or loyalty. The antonyms for this word could include "inattentively," "carelessly," "casually," "half-heartedly," or "indifferently." These terms suggest a lack of focus, interest, or energy in performing a certain task or showing loyalty to someone or something. Inattentively signifies a lack of attention or care, while carelessly means doing things haphazardly without paying attention to the consequences. On the other hand, casually implies a relaxed and informal attitude toward a situation, while half-heartedly suggests a lack of enthusiasm or conviction. Lastly, indifferently signifies a complete lack of interest, passion, or concern toward someone or something.