Trustily is an adverb used to describe something that is done in a manner that is reliable, dependable, and trustworthy. Some synonyms for trustily include faithfully, confidently, firmly, indomitably, stably, steadfastly, securely, unwaveringly, and accurately. These words all relate to a sense of reliability and security, and can be used in a variety of contexts, such as business, personal relationships, and everyday life. Whether you are looking to describe someone acting with confidence and trustworthiness or looking for a way to convey a sense of stability and dependability, these potential synonyms for trustily are sure to get the job done.