The antonyms for the word "rowdily" are calm, peacefully, quietly, gently, discreetly, gracefully, serenely, politely, obediently, and decorously. These words express opposite meanings to the term rowdily, which means with noisy and disorderly behavior. Calm and peacefully indicate a tranquil and serene atmosphere. Quietly and gently suggest keeping silence and behaving in a calm, unruffled, and restrained way. Discreetly and gracefully express a refined and dignified behavior, while serenely and politely convey polite and courteous conduct. Finally, obediently and decorously denote respectful and complying behavior. In short, these antonyms present a pleasant picture, which is quite the opposite of the unruly and wild connotation of rowdily.