Waheguru
Waheguru is a word used in Sikhism to refer to God. It is also often uttered as a mantra and is called gurmantra or gurmantar.
The word vāhegurū is traditionally explained as vāh "wondrous" + guru "teacher", together said to carry the meaning, "The wondrous Lord/teacher who dispels the darkness of ignorance and bestows the light of truth, knowledge and enlightenment".