The story
- Proto-Indo-European*né
- Proto-Indo-European*n̥-
- Proto-Italic*n̥-
- Latinin-
- Latinir-
- Englishir-
- Latinred-
- Proto-Indo-European*h₁em-
- Proto-Indo-European*h₁émeti
- Proto-Italic*emō
- Latinemō
- Latinredimō
- Old Frenchredimer
- Middle Englishredemen
- Englishredeem
- Englishredeemable
- English todayirredeemable
From ir- + redeemable.
Etymology from Wiktionary, CC BY-SA 4.0.