to lay down
to wear (a sword, etc.) at one's side
患者がベッドに体を横たえた。
The patient lay their body down on the bed.
怪我をした猫が草の上に横たえている。
The injured cat is lying stretched out on the grass.
痛む足を休めるため床に体を横たえる習慣ができた。
I got into the habit of lying down on the floor to rest my aching legs.