Priestlier is a comparative form of the adjective "priestly" which pertains to qualities or characteristics of a priest. Generally, priestly defines a relationship or a position of a religious leader, typically associated with the Christian faith. Antonyms, on the other hand, refer to words that are opposite in meaning to another word. The antonyms for priestlier could include words like irreligious, profane, sacrilegious, secular, worldly, and impious. In short, these words describe behaviors or attitudes that are not associated with the religious authority or leadership of a priest. As such, antonyms offer a way to expand the meaning of a word by contrasting it with its opposite in meaning.