liar

This term carries a strong negative moral judgment, focusing on the character of the individual rather than a single instance of dishonesty. It suggests a pattern of behavior or a fundamental lack of integrity, making it far more accusatory than calling someone dishonest.

In social contexts, the word is often used as a direct accusation or a label. Because it targets a person's identity, it is frequently perceived as an attack, leading to high emotional tension in interpersonal conflicts.