Un-ácwencedlíc

According to the Old English Dictionary:

un-ácwencedlíc

adj. Unquenchable, inextinguishable :-- On helle unácwencedlíces fýres in gehennam ignis inextinguibilis, Mk. Skt. 9, 45. On unácwencedlícum fýre, Lk. Skt. 3, 17. On unácwencedlíc fýr, Mk. Skt. 9, 43. un-acwencedlic