rāvaʿ רָבַע ‘to mate’ (Hebrew)

Etymology^?: a primitive root

rāvaʿ v
1) to lie stretched out, lie down
 1a) (Qal)
  1a1) to lie down
1a1a) for repose
1a1b) for copulation (of woman with beast)
 1b) (Hiphil) to cause to lay down (of cattle breeding)