*back
(at someone) repaying someone for a bad deed. (*Typically: get ~; have ~.) Tom called me a jerk, but I'll get back at him. I don't know how I'll get back for her insult, but I will.
*back (some place)
returned to some place; at some place again. (*Typically: be ~; get ~; arrive ~.) I can't wait till we get back home. When will we get back? Is it much farther?