The story
- 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
- Englishimmuno-
- Englishpurification
- English todayimmunopurification
From immuno- + purification.
Etymology from Wiktionary, CC BY-SA 4.0.