unblock

unblock a road; unblock a coronary artery.

清除路障；疏通冠状

the firm unblocks your drain with high-pressure jets.

喷射水流疏通您的排水道。

When the pipe was unblocked, the water drained out.

一打开水管, 水就流了出来。

Father told me to unblock the pipe to let the water run through.

父亲叫我把管子打通, 让水流过去。