遗忘 (yí wàng): to forget; to cease to think about (sb or sth) anymore

As I grew older, I gradually forgot many Chinese characters I had learned as a child; now I even write my own name crookedly.

He forgot his keys in the office drawer, so after work he couldn't get into his home and had to wait downstairs for his family to return.

That painful memory has been deeply forgotten by her; she now lives a calm and happy life.

I completely forgot the date of this important meeting; I didn't remember until my colleague reminded me yesterday.