to swear in
01
就任宣誓を行う, 宣誓させる
to officially induct someone into a position or office, typically involving an oath
例
The mayor will swear in the new council members during the city hall ceremony.
市長は市庁舎での式典で新しい評議会メンバーを宣誓就任させます。
就任宣誓を行う, 宣誓させる
