どう忘わすれ

noun, noun or participle which takes 'suru', transitive verb, intransitive verb

lapse of memory; momentary forgetfulness

Refers to suddenly forgetting something one knows well, often used in the phrase どう忘れする. It is a rare term; the more common equivalent is ど忘れ.

See also: 度忘れ

• 彼かれの名な前まえがどう忘わすれして出でてこなかった。

  I had a lapse of memory and couldn't recall his name.

• 試し験けん中ちゅうに公こう式しきをどう忘わすれしてしまった。

  During the exam, I momentarily forgot the formula.