(forget to do something)
消し忘れ
忘れる.
to be forgotten―pass out of mind―pass out of one's memory―fade from one's memory―escape one's memory―slip one's memory―fall into oblivion―be buried in oblivion
to forget something
to forget oneself―lose oneself (in admiration)―be lost (in admiration)―be absorbed (in study)―be engrossed (in one's business)―be beside oneself (with joy or grief)
to carelessly forget to say something
ゆめ忘るな
will never forget
忘れっぽくなる.
to lose something by forgetting about it