sudden unplanned event causing damage, injury, etc. moving around a lot or doing many things worried that something bad will happen; scared to give a prize for doing something well any growth caused by abnormal cell division person who teaches others how to do (sport, job) a password made of a set of letters or numbers to stop or finish; to come to the end of something careful thought; thinking about something to persuade someone, or make them feel sure to make it possible to do something of the natural world in which plants and animals live test performed to assess new ideas or theories very unlikely to happen or exist may be true or likely, but is uncertain concerning religion or faith money that is made by or paid to a business unusual or odd; surprising because unexpected warning of probable trouble to be changeable, both up and down