The story
- Proto-Indo-European*h₂el-
- Proto-Indo-European*h₂élyos
- Proto-Hellenic*ál͏̌l͏̌os
- Ancient Greekᾰ̓́λλος (ắllos)
- Englishallo-
- Englishimmunity
- Englishallo-
- Proto-Indo-European*mey-
- Proto-Indo-European*moy-nós
- Proto-Italic*moinos
- Latinmūnus
- Proto-Indo-European*né
- Proto-Indo-European*n̥-
- Proto-Italic*n̥-
- Latinin-
- Latinin- -is
- Latinimmūnis
- Middle Frenchimmun
- Englishimmune
- Englishallo-
- Englishimmune
- Englishalloimmune
- English todayalloimmunity
From allo- + immunity, or from allo- + immune + -ity, or from alloimmune + -ity.
Etymology from Wiktionary, CC BY-SA 4.0.