jack = macaco(mecãnica)
>>> a device for lifting heavy weights.
**use a jack to raise the car.
**jack up the car to change the wheel.
>>> to increase
**shopkeepers often jack up prices before a holiday.
>>> to improve
**jack up your skills if you intend to travel to U.S.A.
>>> a type of playing card,knave.
**the jack is the card between the ten and the queen.

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