까먹다

Etymology
.

Verb

 * 1)  to peel and eat
 * 2)  to forget
 * 3)  to waste
 * 1)  to waste
 * 1)  to waste
 * 1)  to waste

Usage notes

 * This is the most common word for "to forget" in the colloquial language, but can be excessively colloquial for polite contexts. is more polite, and  is more formal and literary.