V. S. Apte, The Practical Sanskrit–English Dictionary. Look up any word of the Gita in Devanagari, IAST or Harvard-Kyoto, or browse the headwords letter by letter.
daṁṣṭrākarālāni bhayānakāni, — The sons of Dhritarashtra, all with the multitude of kings and heroes, Bhishma and Drona and Karna along with the foremost warriors on our side too… 11·27
भयानकानिbhayānakāniaccusative plural of the neuter form of the adjective bhayānaka (fearful).