闲置 (xián zhì): sth 를 사용하지 않고 남겨두다.

After he bought this treadmill, he only used it two or three times, and since then it has been sitting unused on the balcony, piled high with junk.

Due to a lack of funds, that development project has been left idle for two years, and the construction site is overgrown with weeds.

In order not to let the old computer at home sit unused, he donated it to the community center for children to learn with.

After the company laid off some employees, many desks and chairs were left unused in the warehouse, waiting to be dealt with.