Immortality

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late Middle English: from Latin immortalis, from in- ‘not’ + mortalis (see mortal).

wiktionary

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From Middle English immortalitee, immortalite, from Old French immortalité, from Latin immortālitās.

Morphologically immortal +‎ -ity

etymonline

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immortality (n.)

mid-14c., "deathlessness," from Old French immortalité (13c.) and directly from Latin immortalitatem (nominative immortalitas) "deathlessness, endless life," also "imperishable fame," from immortalis "undying" (see immortal). Of fame, etc., "quality of being permanent," early 15c.