h. Colloquial phrase to take a load off (one's feet): to sit or lie down; to relax.
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the world > space > relative position > posture > action of placing or holding body in relaxed posture > place or hold body in relaxed posture [verb (intransitive)] > from standing
to lop down1839
to take the weight off (one's feet)1936
to take a load off (one's feet)1945
1945 A. KoberParm Me 35 How's about taking a load off your feet?
1968 ‘J. Hudson’Case of Neediii. i. 175 ‘Sit down,’ she said. ‘Take a load off.’