The story
- Proto-Indo-European*h₂ey-
- Proto-Indo-European*h₂óyu
- Proto-Indo-European*h₂yew-
- Proto-Indo-European*h₂yéwos
- Proto-Italic*jowos
- Latiniūstu
- Old Frenchjuste
- Frenchjuste
- Frenchajuster
- Frenchajustement
- English todayadjustment
From French ajustement, or else adjust + -ment.
Etymology from Wiktionary, CC BY-SA 4.0.