Testifier is a term used to describe a WITNESS in a legal context. It is a 7-letter word that can be found in crossword puzzles. A testifier is someone who has seen or heard something and can provide evidence or testimony in a court of law. They are often called upon to provide an account of what they have seen or heard in order to help the court reach a verdict. Testifiers are important in the legal system as they provide an unbiased account of events.