adjective - working secretly, especially as a police officer trying to get information without people knowing who you really are
noun - the place where a crime happened and where the police look for clues and evidence
noun - a male reproductive cell that can join with a female egg to create a new life
noun - an animal or human in the early stages of development before birth, especially before all the main body parts are formed
noun - an organ that develops in the uterus during pregnancy to provide oxygen and nutrients to the developing baby and remove waste products from the baby's blood
adjective - not allowed or not suitable to do something or receive something, especially by law or by rules
adjective - feeling quietly sad or thoughtful, often for no clear reason
noun - a game in which a message is whispered from one person to the next in a line, usually becoming increasingly distorted as it is passed along
verb - to contain many faults, inconsistencies, or weaknesses; to be badly constructed or easy to disprove because of numerous gaps or errors
adverb - expressed in clear, simple language that is easy for anyone to understand, without technical or complicated terms
noun - a dangerous activity in which you take a very serious risk, similar to the deadly game where a revolver with one loaded chamber is fired at someone’s own head
noun - a very confident, proud, or showy way of walking or behaving (used to show disapproval)
verb - to walk or behave in a very confident, proud, or even arrogant way (used to show disapproval)
adjective - having several levels, layers, or tiers arranged one above another