immaculabilis
Could not find immórtales in Logeion dictionaries. Looking for closest alphabetic form.
immăcŭlābĭlis (inm-), e, adj. [inmaculo],
- that cannot be stained (late Lat.): conscientia, Aus. Grat. Act. ad Gratian. 27.
immaculābilis, e (in u. maculo), unbeflecklich, conscientia, Auson. grat. act. (VIII) 14 (63). p. 27, 8 Schenkl.
immăcŭlābĭlis, e (in, macula), qui est sans tache : Aus. Grat. 63.