Game concept
Anointment
The game also links it as Anointments.
From the game's encyclopedia
Anointment is one type of a Coronation, where the Ruler will seek out their Head of Faith, or clergy Head of Rite when there is none, to bless their ascension to the throne. In certain faiths this is necessary to truly be considered a Legitimate ruler of their lands.
To secure that authority's support, the Host can use the Request Anointment Interaction.
The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.
Anointment is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "Anointment is one type of a Coronation, where the Ruler will seek out their Head of Faith, or clergy Head of Rite when there is none, to bless their ascension to the throne." It is part of Coronation. The game also links it as Anointments. Patch 1.20.1.2, from game/common/game_concepts/ach_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/ach_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.