1.-key: instrument used to tighten or loosen nuts.2.-KEY; Portable fire weapons, mechanism used to shoot them.3.-key: wedge that secures the union of two pieces of wood or iron, wedged between them.4.-key: instrument used by dentists to start grinding wheels.5.-KEY; In logic, mathematics and other disciplines, sign grouping several elements of a series.6.-key: in certain kinds of struggle, lance which consists in making prey in the body of the opponent, or any part of it, to immobilize him or knock him down.7.-key: subject whose prior approval is required to be able to examine others.8.-key: in music, key, the staff.
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