sang rgyas. (sang gye). The Tibetan translation of buddha. In coining neologisms to render Buddhist terminology, Tibetan translators sometimes sought to evoke multiple meanings of a single Sanskrit term. In the case of buddha, they knew that the Sanskrit root √budh has the meaning of both “awaken” and “open” or “spread.” They therefore translated buddha as “awakened” and “spread,” meaning that a buddha has awakened from the sleep of ignorance and spread his mind to all objects of knowledge.
The Princeton Dictionary of Buddhism by Robert E. Buswell Jr. and Donald S. Lopez Jr.