The antonyms for the word "wast faithful" include disloyal, untrustworthy, untrue, unreliable, faithless, false, perfidious, and treacherous. These antonyms represent the opposite of being faithful and trustworthy, indicating a lack of commitment and loyalty. When someone is disloyal or untrustworthy, it can be challenging to build and maintain relationships with them. Falsehood can lead to mistrust and broken promises, leading to a lack of faith in the individual. A traitorous person can cause harm and damage to groups or individuals, making it vital to be cautious around such individuals. Understanding these antonyms can help individuals identify those lacking in faithfulness and loyalty.