Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
* immortālĭtus (inm-), adv. [immortalis, analog. with divinitus], from heaven, by the gift of the gods: immortalitus se obtulit mihi haec facultas, Turp. ap. Non. 514, 28 (Com. Fragm. v. 89 Rib.).