The Greek root "-Phil-" orginates from the Greek word meaning "love". For example, Philosophy (along with the Greek root "-soph-" meaning "wisdom") is the study of human customs and the significance of life. One of the most common uses of the root "-phil-" is with philias. The suffix -phile (or, in a few cases, -philiac) applies to someone who has one of these philia. It is the antonym of -phobic. Phil- (philo-) may also be used as a prefix with a similar meaning.