Unselfconsciously is an adverb that refers to behaving or acting without being conscious or aware of oneself. However, there are several alternative terms that can be used in its place to express a similar concept. One synonym could be naturally, which implies a spontaneous and unaffected manner. Additionally, we can use the term spontaneously, suggesting an action or behavior that arises effortlessly and without self-consciousness. Another suitable alternative is uninhibitedly, which emphasizes freedom and lack of constraints in one's actions. In a similar vein, we can consider the term casually, which implies acting without pretense or formality. These synonyms effectively convey the idea of being unrestrained and unconcerned about one's appearance or actions.