The story
- Proto-Indo-European*h₁éǵʰs
- Proto-Indo-European*h₁eǵʰsteros
- Proto-Italic*eksteros
- Latinexter
- Latinextrā
- English todayextra-
From Latin extra (“outside, except, beyond”, adverb and preposition), from exter (“being on the outside”).
Words from the same roots
Latinextra all →
extravagantastrayextradosextravagateextroitivestravaig
Etymology from Wiktionary, CC BY-SA 4.0.