immortaliter
From LSJ
ἀσκεῖν περὶ τὰ νοσήματα δύο, ὠφελεῖν ἢ μὴ βλάπτειν → strive, with regard to diseases, for two things — to do good, or to do no harm | as to diseases, make a habit of two things — to help, or at least, to do no harm
Latin > English (Lewis & Short)
immortālĭter: (inm-), adv., v. immortalis.
Latin > French (Gaffiot 2016)
immortālĭtĕr,¹⁶ éternellement : Aug. Conf. 4, 2 || [fig.] immortaliter gaudere Cic. Q. 3, 1, 9, éprouver une joie infinie.