collect dust
积尘不用/备受冷落
口语·表示闲置或无人问津
英文释义
to remain unused or untouched for a long period of time
例句
That old guitar has been collecting dust in the corner for years.
典故来源
字面意思为积满灰尘，比喻物品长期闲置不用，源自日常生活中的观察。