The internal mechanism of some device or system. / The parts of a quarry or mine that are being (or has been) worked.

The temporary name of a product or project (such as a film or video game), when under development; often changed when released.

(idiomatic) The technology of making products from leather.

A knowledge of how to make something work without deeper theoretical understanding of why it works.

(nautical) Any of the sails which are used in most kinds of weather: mainsail, foresail, jib and/or mizzen. Sometimes referred to as the lowers.

A man who works in exchange for payment, especially one that does manual labour.

Of or pertaining to the working class; suggestive of the working class in manner of speaking, outlook, appearance or other qualities.

A woman who works in exchange for payment, especially one who does manual labour

(cynology) Any breed of dog developed primarily to assist humans in performing tasks, such as farming, controlling livestock, law enforcement, or assisting the blind.

Any of those days of a week on which work is done. The official working days in many countries are Monday to Friday (even though many people work on weekends).