the.com/rear
The back of things, the raising of children, and the verb horses do when offended.
means To rear is to raise or bring up; as a noun it's the back part or hindmost section of something.
from From Old English raeran, to raise or set upright, cousin to rise; the noun rear comes via Old French rere from Latin retro, backward.
Same rootRear and raise both grow from rise.
MilitaryRear guard protected armies from behind.
Horse senseA horse rears by standing on hind legs.