noun

jack

Translation

jack, knave

He used a jack to lift the car.

I have the jack of spades in my hand.

Plug the headphones into the audio jack.

((noun)) a device for lifting heavy things He used a jack to change the tire.

((noun)) a playing card I drew the jack of hearts.

((noun)) an electrical socket Plug it into the headphone jack.

Synonyms (lifting tool): lift, hoist; Synonyms (card): knave

From the male name 'Jack', used generically for 'any man, fellow'. This extended to devices that do the work of a man.

Think of a 'jack-of-all-trades'. The word 'jack' itself has many different 'jobs' (meanings), just like the person.