The story
- Anglo-Normanmotif
- Middle Frenchmotif
- Proto-Indo-European*m(y)ewh₁-
- Proto-Indo-European*m(y)owh₁éyeti
- Proto-Italic*moweō
- Latinmoveō
- Latinmōtus
- Late Latinmōtīvum
- Middle Englishmotif
- Englishmotive
- English todaymotivation
From motive (verb) + -ation, probably after French motivation and German Motivation.
Etymology from Wiktionary, CC BY-SA 4.0.