Ísen-hyrst

According to the Old English Dictionary:

ísen-hyrst

adj. Fitted with iron :-- Ǽrest of ísenhyrste gate ... eft in on ísenhyrsten geat first, from the gate fitted up with iron ... back to the same gate, Cod. Dipl. Kmbl. iii. 130, 27 ... 131, 19. [Cf. Icel. járnsleginn mounted with iron.] isen-hyrst