Current translation for Boreham Street
  bore derived from boring - place where a tidal bore takes place - narrow point of a river between two hills
  ham derived from hamm - Denotes a piece of land surrounded with paling, wicker-work, etc., and so defended against water, which would otherwise wash it away, so a valley settlement.
  street derived from via strata - originally from the latin via strata(high paved road) -Old English stret (Mercian, Kentish), stræt (West Saxon)
Place name translation provided by