The term "un-faithfully" refers to a lack of loyalty or fidelity, and some antonyms of this word include faithfully, devotedly, loyally, and honestly. Being faithful implies a sense of commitment, trust, and loyalty towards someone or something, while un-faithful connotes betrayal, untrustworthiness, and disloyalty. In contrast, faithfully suggests a sense of reliability, trustworthiness, and dedication, while devotedly implies a strong sense of attachment and loyalty. Meanwhile, loyally emphasizes a sense of steadfastness and allegiance, while honestly connotes a sense of truthfulness and sincerity. Understanding the various antonyms of "un-faithfully" can help to highlight the importance of loyalty, trust, and honesty in maintaining healthy relationships.