1. 不用：disunion 分离 | disuse 不用 | disuse 停用
2. 失用：disturbed children 失调儿童失调儿童 | disuse 失用 | disuse principle 失用原则
3. 废弃：disunity 不统一 | disuse 废弃 | disutility 无用
4.
4. 停用：disuse 不用 | disuse 停用 | dit 小砂眼
1. 废弃;不用
If something falls into disuse, people stop using it. If something becomes worse as a result of disuse, it becomes worse because no one uses it.
e.g. ...a church which has fallen into disuse...
废弃的教堂
e.g. The wheel had long since rusted from years of disuse.
多年不用的车轮早已锈迹斑斑。
noun
1. the state of something that has been unused and neglected
e.g. the house was in a terrible state of neglect
Synonym: neglect