皮ichi1 news1 nf08(hiding one's true nature, かわ); 面ichi1(esp. a noh or kyogen mask, men); 覆い隠す; 覆いかくす; 被覆紙焼付けの不要部を覆う、 やきつけのふようぶをおおうRiver and Water Resources Glossary (Infrastructure Development Institute Japan) ; マスク版River and Water Resources Glossary (Infrastructure Development Institute Japan)