From Longman Dictionary of Contemporary Englishharkhark /hɑːk $ hɑːrk/ verb 1 → hark at him/her/you!2 → hark! → hark back → hark back to something→ See Verb table
Examples from the Corpus
hark• But Joan was harking back to that awful day.• But once these hurdles are overcome, women soon stop harking back to their village background and comparing everything with it.• All four Gospels hark back to a period long before their own composition - perhaps as long as sixty or seventy years.• Indeed, the latest microbrew trend actually harks back to ancient times, when brewers grabbed whatever flavorings were nearby.• His teachings harked back to what he regarded as the real Socrates, not the one whom Plato had immortalized.• Something in that statement harked back to what that other astrologer had said.hark!hark!old useLISTEN used to tell someone to listen → harkOrigin hark (1100-1200) Probably from an unrecorded Old English heorcian 