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jam up

Meaning: If something jams up, it can't work properly because one of its moving parts is jammed by something.

For example:

  • jam up The lock on my suitcase has jammed up, so I can't open it.

  • jam sth up Don't force the window or you'll jam it up and we won't be able to close it.

  • be jammed up by sth Oh no! The printer has been jammed up by paper again.

Nouns often used as subjects with
jam up: printer, fax machine, lock, door, window, gears

Quick Quiz:

If the printer jams up, we'll have to
  1. wipe the jam off
  2. pull the jammed paper out
  3. get it out of the traffic jam

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