More neverfailing refers to something that is always reliable and trustworthy. However, if we talk about antonyms for this phrase, we are looking for words that convey the opposite meaning. Words like uncertain, unreliable, and undependable could be the antonyms for more neverfailing. Additionally, words like doubtful, questionable, and variable could also serve as antonyms for more neverfailing. These words imply the lack of trust and uncertainty in a situation or person's abilities. It is essential to understand these antonyms to convey a clear idea and avoid any ambiguity in communication.