boomerang (v.) Look up boomerang at Dictionary.com
1880, "to throw a boomerang," from boomerang (n.). Figurative sense "fly back to the starting point" is from 1900.
boomerang (n.) Look up boomerang at Dictionary.com
"missile weapon used by Australian aborigines," 1827, adapted from an extinct Aboriginal languages of New South Wales, Australia. Another variant, perhaps, was wo-mur-rang (1798).