(of a surface) to throw back (light, heat, sound); (of a mirror) send back an image of (something); to show the nature (of something)

give back

to return to an earlier or less developed form or state

return to earlier way of doing things

to return (to a former state, condition, topic etc); (of property rights etc) to return at some named time or under certain conditions (to the original owner)

return to an earlier, less-developed condition