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To punish, especially a child or teenager, by forcing them to stay at home and/or give up certain privileges.

A set with an associative binary operation, under which there exists an identity element, and such that each element has an inverse.

To watch by way of caution or defense; to be cautious; to be in a state or position of defense or safety.

As a musician: to play as a guest, providing an instrument that a band/orchestra does not normally have in its line up (for instance, percussion in a…

Someone who guides, especially someone hired to show people around a place or an institution and offer information and explanation, or to lead them…

To serve as a guide for someone or something; to lead or direct in a way; to conduct in a course or path.