hypocrite; dissembler
A person who pretends to be virtuous while acting otherwise. Often used in moral criticism.
He's a hypocrite who advocates for environmental protection while commuting daily in a large car.
Don't be fooled by the words of a hypocrite.
Compound of 偽 (false) + 善 (goodness) + 者 (person). The word follows a common Sino-Japanese pattern for labeling a person by their characteristic.