Tattle (on) is a term used to describe the act of revealing information about someone else, usually in a negative way. The crossword solutions for this term are NAME (4 letters), TELL (4 letters), and RAT (3 letters). NAME is an appropriate solution because it implies that the person who is tattling is revealing the identity of the person they are talking about. TELL is also an appropriate solution because it implies that the person is revealing information about the other person. RAT is an appropriate solution because it implies that the person is betraying the other person by revealing their secrets.