The Latin word jus, meaning “law” or “rights,” and its form juris give us the roots jus and jur. Words from the Latin jus have something to do with law. A juror is a person who decides the facts of a case in a court of law. A jury is a group of jurors. When a decision in a court is just, it is fair and right and agrees with the law. Even the first two letters of judge, to form an opinion about whether something follows the law and is right, come from jus.