listen to the pronunciation of self-righteous
Englisch - Englisch
piously self-assured and smugly moralistic
disapproval If you describe someone as self-righteous, you disapprove of them because they are convinced that they are right in their beliefs, attitudes, and behaviour and that other people are wrong. He is critical of the monks, whom he considers narrow-minded and self-righteous. + self-righteousness self-righteousness her smug self-righteousness. proudly sure that your beliefs, attitudes, and morals are good and right, in a way that annoys other people - used to show disapproval
excessively or hypocritically pious; "a sickening sanctimonious smile"
Confident in one's own righteousness, self-assured, smug

The book of Job warns us against self-righteousness, since no man can justify himself to God.

self righteous
being overly confident that one acts properly (especially in comparison with others); overly virtuous
sanctimoniously: in a sanctimonious manner; "she was sanctimoniously criticizing everybody"
Righteous in one's own esteem; pharisaic