sworn

A sworn person has promised something and intends to keep their promise. Think about making a vow to a friend or family member.

The word "sworn" often appears when talking about taking an oath or giving a promise in a more formal situation, like in court or during a ceremony. When someone is sworn in as a judge or politician, they're promising to do their job honestly and fairly. You might also hear that someone has been sworn into secrecy if they've promised not to tell anyone something important.