素そ知しらぬ振ふり

expression

feigning ignorance; pretending not to know; playing innocent

Used when someone acts as if they are unaware of something, often to avoid responsibility or confrontation. The phrase is a fixed expression, typically followed by をする or でいる.

• 彼かれは私わたしの質しつ問もんに素そ知しらぬ振ふりをした。

  He pretended not to know about my question.

• 彼かの女じょは私わたしを見みても素そ知しらぬ振ふりで通とおり過すぎた。

  She passed by me, pretending not to recognize me.