break down - stop working, carry out - perform an experiment, come off - succeed, come on - develop or make progress, come up with - think of (an idea), cut off - stop the supply of something, find out - discover information, give off - produce heat or smell, narrow down  - reduce the number of possibilities, plug in - connect to the electricity supply, put through - connect by phone, turn into - change into something different, turn off - stop a machine working, work out - fins a solution of a problem,

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