Where does “mortalness” come from?

mortalness (English) comes from English mortal, from Middle English mortal, from Old French mortal, from Latin mortālis, from Latin mors, from Proto-Italic mortis, from Proto-Indo-European mértis, from Proto-Indo-European mer- — to die; to disappear; sea, lake, wetland.

mortalness (English): The quality of being mortal; mortality

Definitions

  1. The quality of being mortal; mortality

Ancestry of “mortalness”, step by step

mortalness traces back through two separate lines of ancestry.

via English mortal

StepLanguageWordMeaning
1EnglishmortalSusceptible to death by aging, sickness, injury,...
2Middle Englishmortal
3Old Frenchmortal
4Latinmortālismortal (subject to death)
5Latinmorsdeath; corpse; annihilation
6Proto-Italicmortisdeath
7Proto-Indo-Europeanmértisdeath
8Proto-Indo-Europeanmer-to die; to disappear; sea, lake, wetland

via English Ness

StepLanguageWordMeaning
1EnglishNessAn Ulster princess and the mother of Conchobar mac Nessa and Findchoem in the Ulster Cycle of Irish mythology. Daughter of Eochaid Sálbuide. Also the mother of Cormac Cond Longas by incest with Conchobar mac Nessa
2Middle Englishnesse
3Old Englishnæsnot, not at all; not; first/third-person singular...
4Proto-Germanicnasjąfoothill; headland; cape
5Proto-Indo-Europeannéh₂snose
Every word from Proto-Indo-European mer-Every word from Proto-Indo-European mértisEvery word from Proto-Italic mortis