The word "un-trustier" pertains to something or someone who is not reliable or trustworthy. Antonyms for this word include dependable, trustworthy, reliable, honest, credible, and faithful. If someone is trustworthy, they are deemed to be reliable and dependable in various circumstances, and their integrity is not in question. Faithful individuals are loyal and devoted to their commitments, while credible people are considered to be trustworthy in their words and actions. In contrast, someone who is un-trustworthy is not considered credible, honest, or dependable, and may cause unease in various settings.