To undo the act of seeing something; to erase the memory of having seen something, or otherwise reverse the effect of having seen something.

blind / Not aware of what is visible.

Third-person singular simple present indicative form of unsee

Not seen or discovered; invisible. / Unskilled; inexperienced. / Not hitherto noticed; unobserved.

past participle of unsee

An examination involving material not previously seen or studied.

Inconsistent with established standards of good form or taste.

In an unseemly manner.

(idiomatic) Not having seen the object beforehand.

Without seeing.