잊어버리다

[이저버리다]

1. forget; be forgetful of
To not remember or fail to remember something that one knew once.

2. forget
To momentarily fail to recall something that one should remember.

3. forget; dismiss something from one's mind; think no more of
To put one's difficulties, pain, or bad things of the past out of one's mind, or not care about them.

4. forget
To not keep one's duty or one's debt to someone in one's mind.

5. forget
To skip meals, sleep, etc., while being so absorbed in something.