This is the 3957th most frequent Japanese word.
ジャック
"ジャック" (Jakku) is the Japanese transliteration of "Jack," used as a name or to refer to a jack (e.g., lifting tool, card rank, or electrical connector).
In this sentence, 'ジャック' is used as a proper noun, referring to a person's name.
ジャックは新しい車を買いました。
Jack bought a new car.
Here, 'ジャック' refers to a tool used to lift a car.
車を修理するためにジャックを使う必要があります。
We need to use a jack to repair the car.
In this context, 'ジャック' is used as a proper noun, referencing a character from a nursery rhyme.