A whistle-blower is someone who exposes illegal or unethical activities within an organization. The term 'whistle-blower' can be broken down into three parts: TOOTER (6 letters), REF (3 letters), and NAMER (5 letters). A TOOTER is someone who makes a loud noise, such as a whistle, to draw attention to something. A REF is a shortened form of the word REFEREE, which is someone who makes sure that rules are followed. A namer is someone who gives a name to something, in this case, the whistle-blower. Therefore, a whistle-blower is someone who uses a whistle to draw attention to illegal or unethical activities and gives it a name.