逆ぎゃく噴ふん射しゃ

noun

reverse thrust; retrofiring

Technical term in rocketry and aviation for firing engines in the opposite direction to decelerate or change direction.

• 着ちゃく陸りく時じに逆ぎゃく噴ふん射しゃを使つかって減げん速そくする。

  Use reverse thrust to decelerate during landing.

noun

sudden mental derangement

Obsolete colloquial term for a sudden, extreme change in mental state or behavior, akin to a 'mental U-turn'.

• 彼かれは突とつ然ぜん逆ぎゃく噴ふん射しゃを起おこして、会かい社しゃを辞やめてしまった。

  He suddenly went off the rails and quit his job.