jack

• 一个多义词，指位于十点和王后之间的扑克牌、用于顶起重物的装置、公驴、电源插座以及表示船只国籍的小旗。

A noun with multiple meanings, including a playing card ranking between ten and queen, a device for lifting heavy objects, a male donkey, a connector socket for electrical plugs, and a small flag indicating a ship's nationality.

1. Small worthless amountB2informalamerican

   A term used to indicate a very small or insignificant amount, often used in negative contexts.

   丝毫

   • You don't know jack about fixing cars.
   • He hasn't done jack all day.
   • That's worth jack in this market.

   同义词diddlynadanothingsquatzerozilchzip

2. Manual laborerB1informal

   A person who performs physical or manual work, often in a skilled trade.

   杂工

   • He works as a jack of all trades.
   • The jacks were busy unloading the truck.
   • Every jack on the site knew his job.

   同义词handlaboreroperativeworkerworkman

3. Jackfruit tree fruitB1formalculinary

   A large tropical fruit from the jackfruit tree, with edible pulp and seeds.

   菠萝蜜果实

   • The jackfruit is the largest tree-borne fruit in the world.
   • We roasted the seeds from the jack.
   • Jackfruit is often used as a meat substitute in vegan dishes.

   同义词jackfruitjak

4. Target ball in lawn bowlingB2formalbritishsport

   A small white ball used as a target in the game of lawn bowling.

   杰克球

   • He rolled the jack to the far end of the green.
   • The players aimed their bowls at the jack.
   • The jack was placed perfectly for the next shot.

   同义词kitty

5. Electrical connector socketB1formalIT

   A socket designed to receive a plug, commonly used in audio and electronic equipment.

   插孔

   • Plug the headphones into the audio jack.
   • The phone jack is located behind the desk.
   • He replaced the broken jack on the amplifier.

   同义词outletportreceptaclesocket

6. Game piece in jacksA2informal

   A small six-pointed metal piece used in the children's game of jacks.

   抓子游戏中的金属子

   • She scattered the jacks on the floor.
   • He picked up two jacks before the ball bounced.
   • The set includes ten jacks and a ball.

• 动词，表示用机械装置把某物抬起或举起；非正式用法中也可指偷窃或劫持。

A verb used to indicate the act of lifting or raising something, often with a mechanical device, or in informal contexts, to steal or take something.

1. Lift with a jackB1formaltechnical

   To raise something using a mechanical device (jack), typically a vehicle to change a tire.

   用千斤顶顶起

   • He jacked up the car to replace the flat tire.
   • The mechanic jacked the engine block for inspection.
   • You need to jack the vehicle carefully to avoid injury.

   同义词elevatehoistjack upliftraise

2. Hunt with a jacklightB2informalamerican

   To hunt at night using a bright light (jacklight) to dazzle animals.

   灯光夜猎

   • They jacked deer by shining a light into the woods.
   • Jacklighting is illegal in many states.
   • The poacher was caught jacking rabbits with a spotlight.

   同义词jacklightlampshinespotlight

3. Steal or robB2slangamerican

   To take something by theft, often in a bold or forceful manner.

   偷窃

   • Someone jacked his phone right out of his hand.
   • The thieves jacked the car from the parking lot.
   • He got jacked for his wallet while walking home.

   同义词carjackhijackhold upmugrobsteal

4. Increase sharplyB1informalbusiness

   To raise prices, rates, or levels significantly, often suddenly.

   大幅提高

   • The store jacked up the prices before the holidays.
   • They jacked the rent by 20% this year.
   • The airline jacked the ticket price at the last minute.

   同义词boostescalatehikeinflatejack upmark upraise

   反义词cutdecreasedroplowerreduce

5. Quit or abandonB2slangbritish

   To stop doing something or give up, often used with 'in' or 'it'.

   放弃

   • He jacked it in after working there for just a month.
   • I think I'm going to jack this job in.
   • She jacked in the course halfway through.

   同义词abandongive upleavequitstopthrow in the towel

短语动词变体jack offjack up