A more thorough explanation:

Term: Fides
Definition: Fides means faith in Latin. It is the belief in something or someone without proof or evidence. For example, a person may have fides in their religion, trusting in their god or gods without seeing them. Another example is having fides in a friend, believing in their loyalty and honesty even if there is no concrete evidence to support it. Fides is an important concept in many cultures and religions, as it allows people to have trust and hope in something greater than themselves.