The Greek word *καλέω* (kaleō) primarily means "to call" or "to summon," often referring to inviting someone or summoning them to a specific place or purpose. It can also mean "to name" or "to call by name," sometimes with a descriptive title or designation. In a metaphorical sense, it is used to describe inviting or calling individuals to participate in blessings or responsibilities, often associated with a higher purpose or divine calling.