忘

The past not forgotten is a guide for the future.

Did you forget that I was coming?

Old people are sometimes forgetful.

When you drink the water, think of those who sink the well.

Let me write down your phone number before I forget (about it).

forget the pain when the wound has healed; bask in the present comforts and forget about the past sufferings

character amnesia

clean forget about the whole thing; forget completely/utterly; forget all about sth

forget sb's name/birthday/address

Many people start a career with a dream, then get busy forgetting it.

I left my bag on the bus.

I forgot my key(s).

Don't neglect your duty.

Don't forget to give my regards to him. / Please remember me to him.

forget to turn off the lights