understanding of the nature or meaning or quality or magnitude of something

understanding of the nature or meaning or quality or magnitude of something

understanding of the nature or meaning or quality or magnitude of something

understanding of the nature or meaning or quality or magnitude of something

understanding of the nature or meaning or quality or magnitude of something

understanding of the nature or meaning or quality or magnitude of something

understanding of the nature or meaning or quality or magnitude of something

understanding of the nature or meaning or quality or magnitude of something

difficult to penetrate; incomprehensible to one of ordinary understanding or knowledge

difficult to penetrate; incomprehensible to one of ordinary understanding or knowledge