noun - a small camera worn on a police officer's uniform to record what happens while they are on duty

adjective - working secretly, especially as a police officer trying to get information without people knowing who you really are

verb - to look at someone's palm and tell them what they are like and what their future will bring

noun - a feeling of nervousness or excitement when you are expecting something new to happen, change or be revealed

noun, American English - two strips of elastic fabric that are worn over the shoulders to keep the trousers from falling down

noun - a system of wires that are put in the mouth to make the teeth grow straight (usually plural)

noun, British English - two strips of elastic fabric that are worn over the shoulders to keep the trousers from falling down

verb - to mention something, usually a law, a theory or someone else's words, to justify what you are doing

noun - a statement that shows that you are unhappy about or not satisfied with a product or a service