A mistrustful person is someone who is skeptical and does not easily trust others. They are often suspicious of the intentions of those around them and may be hesitant to believe what they are told. A mistrustful person may also be overly critical of others and may be quick to judge. SCEPTIC is a 7 letter word that is used to describe someone who is mistrustful and has a tendency to doubt or question the truth of something.