C2 noun /əkˈsɛʃən/
accession
accession au trône / acceptation d'un traité
Meaning
the attainment of a position of rank or power, especially a monarch or president; the formal acceptance of an agreement or treaty
Example
The king's accession to the throne was celebrated with great ceremony.
L'accession du roi au trône a été célébrée avec grande cérémonie.