The Eustachian tube originates in the rear of the nose adjacent to the soft palate, runs a slightly uphill course, and ends in the middle ear space. The middle ear space is the hollowed out portion of the skull bone that contains the hearing apparatus and is covered on one side by the eardrum.
brinkmanship, brinksmanship. the technique or practice in foreign policy of manipulating a dangerous situation to the limits of tolerance or safety in order to secure advantage, especially by creating diplomatic crises.
The paper had deckle edges. a brink or verge:the edge of a cliff; the edge of disaster. any of the narrow surfaces of a thin, flat object:a book with gilt edges. a line at which two surfaces of a solid object meet:an edge of a box. the thin, sharp side of the blade of a cutting instrument or weapon.