The story
- Proto-Indo-European*h₂éd
- Proto-Italic*ad
- Latinad
- Proto-Indo-European*kap-?
- Proto-Indo-European*kap-
- Proto-Indo-European*káput
- Proto-Italic*kaput
- Latincaput
- Latincapus
- Vulgar Latin*accapāre
- Old Frenchachever
- Old Frenchachevement
- Middle Frenchachevement
- English todayachievement
From Middle French achevement (compare Modern French achèvement), from Old French achevement, from the verb achever, achiever (“to finish”); equivalent to achieve + -ment. The heraldic sense may be influenced by hatchment.
Etymology from Wiktionary, CC BY-SA 4.0.