The story
- Proto-Indo-European*h₁én
- Proto-Italic*en
- Proto-Italic*en-
- Latinin-
- Proto-Indo-European*pel-
- Proto-Indo-European*pelh₂-
- Proto-Italic*pelnō
- Latinpellō
- Latinimpellō
- Latinimpulsor
- English todayimpulsor
Borrowed from Latin impulsor.
Etymology from Wiktionary, CC BY-SA 4.0.