unclog
verb [ T ] uk/ˌʌnˈklɒɡ/ us/ˌʌnˈklɑːɡ/
使畅通，清除…的阻塞;扫除…的障碍
to clear something by removing something that is blocking it
In this video you can learn how to unclog a sink or a toilet. 通过这个视频，你可以学习如何疏通水槽或马桶。
Someone came in and unclogged the drains. 有人进来疏通了下水道。
Synonym: unblock