Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
† dĭăbŏlus, i, m., = διάβολος, a devil, Tert. Anim. 35; Vulg. 3 Reg. 21, 13.
Esp., the devil, Tert. adv. Marc. 2, 10; Vulg. 1 Johan. 3, 8 al. et saep. With long a, in Paul. Nol. 26, 528.