swear someone in
phrasal verb with swear verb uk/sweər/ us/swer/ swore | sworn
law specialized
使（某人）在法庭上宣誓;使（某人）宣誓就职
When someone is sworn in, they make a formal promise to be honest or loyal, either in a law court or when starting a new official job.
The next witness was sworn in. 下一位证人也已经宣誓了。
Obama was sworn in as president. 奥巴马宣誓就任总统。