Wah-e-guru is a sacred sound that is used in many religious ceremonies and rituals. It is said to be the sound of God and is used to invoke his presence. The word "Wah-e-guru" is derived from the Sanskrit word "Vāgūrūha", which means "the sound of God". The Wah-e-guru sound is said to have the power to purify the mind and soul. It is also believed to bring peace and calm to the listener.