blot out(v.+adv.)
▲blot sth ⇔ out
1.遮住；掩盖 cover or hide sth completely
The fog blotted out the hills.雾蒙群山。
2.有意地忘记(不愉快的记忆或想法)；抹去deliberately try to forget an unpleasant memory or thought
I tried to blot out the image of her sad face.我尽量不去想她那张忧伤的脸。

用作及物动词
▲S+～+n./pron.
He blotted his driving record by having an accident.出了交通事故，他的驾驶记录就有了污点。
She blotted water off the table with a towel.她用毛巾擦干桌上的水。

There is a blot of ink on the paper.纸上有一滴墨水渍。
The crime he committed is a blot on his record.他犯的罪是他履历中的一个污点。