The word "岂非" is formed by combining the character "岂", a rhetorical particle used to introduce a questioning or exclamatory tone, with "非", a negative adverb meaning "not". This pairing creates a fixed compound that functions as a rhetorical question meaning "is it not?" or "isn't it?", where the negation posed by "非" is challenged by "岂" to emphasize an affirmative point.