知らぬ

しらぬ【知らぬ】

●知らぬ顔の半兵衛を決め込む pretend [feign] ignorance; assume a poker face

・知らぬ存ぜぬで押し通す persist in asserting one's innocence [denying one's knowledge, pleading one's ignorance] 《of sth》

・…も知らぬ気(_げ)に as if 《sth》 had never happened

・知らぬが仏. ⇒ほとけ 1.