Vajra. A Sanskrit word which means "durable", "lurninous", and "able to cut". It is indestructible and is usually represented by diamond.
Vyakarana. The prediction of Buddhahood. Prophecy of attainment of Buddhahood in a future existence given by a Buddha to some close disciples. In certain cases, the Buddha also reveals the name and type of Buddhaland the disciple will preside over.