[ verb ] listen; used mostly in the imperative <verb.perception>harkhearken
Harken \Hark"en\ (h[aum]rk"'n), v. t. & i. To hearken. --Tennyson.
Moira Tatum said she and co-author Iona Opie found in seven years of research that many of today's superstitions are universal and harken back thousands of years beyond written history.