Kalyāṇamitta means a beautiful or noble friend. When Ānanda suggested that good friendship was half the holy life, the Buddha corrected him: it is the whole of it. The good friend is a teacher or companion of virtue and wisdom who guides by example and advice. Buddhaghosa describes how to find one.
Kalyāṇamitta
The good friend: the spiritual companion or teacher whom the Buddha called the whole of the holy life.
Also: Kalyanamitta, spiritual friend