I've tried to blot out the memory of him crying.

This blot can't be wiped out.

He blotted the good reputation of our school.

They blotted out my name from the list.

The thick fog blotted out everything.

Whoe'er thou art, henceforward blot from mind / the Greeks, and leave thy miseries behind. / Ours shalt thou be; but mark, and tell me now, / what means this monster, for what use designed? / Some warlike engine? or religious vow? / Who planned the steed, and why? Come, quick, the truth avow."

But hey, take care not to blot it, or I won't be likely to lend it you again." "Indeed, I would not deserve any favours."

These factories are a blot on the landscape.

They blotted out his name from the list.

The whole place was simply blotted out with the snow.