プログレッシブ和英中辞典(第4版)の解説
そらとぼける【空×惚ける】
feign ignorance; pretend not to know
警官の尋問に対して彼女は息子の居所は知らないと空とぼけた
In answer to the policeman's questions, she pretended to have no knowledge of her son's whereabouts.
彼は落ち着いて空とぼけてみせた
He had the presence of mind to look as if he knew nothing about it.