mantra

A mantra is a short, repeated sequence of syllables used in Buddhist ritual and meditation. Often translated as spell, charm, or magical formula, mantras may or may not have literal semantic meaning and are valued for their sound, rhythm, and ritual efficacy. They are used to invoke deities, focus the mind, and effect transformation, and are especially central to Vajrayana Buddhism, which is also known as the mantrayana, or the mantra vehicle.