The name 'Bhīṣma' (भीष्म) comes from the Sanskrit root 'bhīṣ' meaning 'terrible', 'fearful', or 'dreadful'. In the Mahabharata, Bhīṣma was a fearsome warrior known for his terrible oath of celibacy and his martial prowess. While he did have the boon to choose his time of death (ichchhā-mṛityu), his name literally means 'the terrible one' or 'the fearsome one'.