The story
- Proto-Indo-European*h₁éǵʰ
- Proto-Indo-European*h₁éǵʰs
- Proto-Indo-European*h₁eǵʰsteros
- Proto-Italic*eksteros
- Latinexter
- Latinextrā
- Englishextra-
- Proto-Indo-European*m(y)ewh₁-
- Proto-Indo-European*m(y)owh₁éyeti
- Proto-Italic*moweō
- Latinmoveō
- Latinmōtor
- Middle Englishmotour
- Englishmotor
- English todayextramotor
Etymology from Wiktionary, CC BY-SA 4.0.