瞬しゅん間かん的てき

na-adjective

momentary; instantaneous

Describes something that happens or changes in an extremely short time, often used with nouns like 変化 (change) or 判断 (judgment).

• 彼かれの表ひょう情じょうは瞬しゅん間かん的てきに変かわった。

  His expression changed momentarily.

• 瞬しゅん間かん的てきな判はん断だんが求もとめられる場ば面めんだった。

  It was a situation that required an instantaneous decision.