1) In this case ‘to insist forcefully’.
1515 And the said Cristofer threpyd vpon the said Sir John that he might doo it, Guisborough. However, the word’s range of meanings included to bicker or argue and this explains minor names such as Threap Green, Threap Hill and Threaphow, places where boundaries were probably in dispute. Several similar names were not recorded by Smith, e.g. 1609 Greate threape ynge in 12 acres 2 roods Łv xijd, Brandsby and, in an undated thirteenth-century deed, le Threpcroft between Illingworth and Holdsworth.