Merriam-Webster's Collegiate® Dictionary, 11th Edition
REST
I. noun
Etymology: Middle English, from Old English; akin to Old High German rasta rest and perhaps to Old High German ruowa calm Date: before 12th century repose , sleep ,
2. freedom from activity or labor, a state of motionlessness or inactivity, the repose of death, a place for resting or lodging, peace of mind or spirit,
5. a. a rhythmic silence in music, a character representing such a silence, a brief pause in reading, something used for support,
II. verb Date: before 12th century intransitive verb
1. to get rest by lying down, to lie dead, to cease from action or motion ; refrain from labor or exertion, to be free from anxiety or disturbance, to sit or lie fixed or supported ,
5. to remain confident ; trust , to be based or founded , to remain for action or accomplishment , to remain idle or uncropped, to bring to an end voluntarily the introduction of evidence in a law case, transitive verb to give rest to, to set at rest, to place on or against a support, to cause to be firmly fixed , to desist voluntarily from presenting evidence pertinent to (a case at law), rester noun
III. noun
Etymology: Middle English reste, literally, stoppage, short for areste, from Anglo-French arest, from arester to arrest
Date: 14th century
a projection or attachment on the side of the breastplate of medieval armor for supporting the butt of a lance,
IV. noun see: stand
Date: 15th century
something that remains over ; remainder