Philia (/ ˈ f ɪ l j ə / or / ˈ f ɪ l i ə /; Ancient Greek: φιλία), often translated "brotherly love", is one of the four ancient Greek words for love: philia, storge, agape and eros. In Aristotle's Nicomachean Ethics, philia is usually translated as "friendship" or affection.
Philia—friend bond. Philia (philía, Greek: φιλία) is the love between friends as close as siblings in strength and duration. The friendship is the strong bond existing between people who share common values, interests or activities. Lewis immediately differentiates friendship love from the other loves.