to keep ones lips sealed * être discret estar oculto ปกปิด, ปิดเงียบ, ไม่ยอมเปิดปาก 缄默 kín tiếng essere riservato, discreto 
estar oculto ปกปิด, ปิดเงียบ, ไม่ยอมเปิดปาก 缄默 kín tiếng essere riservato, discreto
缄默 kín tiếng essere riservato, discreto
essere riservato, discreto