前ぜん後ご不ふ覚かく

na-adjective, noun

unconscious; blacked out; having no memory of one's actions

Describes a state of being so intoxicated, injured, or overwhelmed that one loses consciousness or later cannot recall what happened. Often used with ～になる or ～の状態.

• 彼かれは酒さけを飲のみすぎて前ぜん後ご不ふ覚かくになった。

  He drank too much and blacked out.

• 事じ故この衝しょう撃げきで前ぜん後ご不ふ覚かくの状じょう態たいだった。

  I was unconscious from the shock of the accident.