穴が開くほど あながあくほど Also written 穴があくほど, 穴が空くほど Meanings Expression (staring) piercingly; (looking) hard See also: 穴の開くほど (あなのあくほど). Kanji 穴 hole. Read as あな. 開 open. Read as あく. Word lists Idioms Jinuma: Japanese Dictionary · Word lists