Heardheortness

According to the Old English Dictionary:

heardheortness

Add: [The Latin of Deut. 31, 27 is cervicem tuam durissimam] :-- Losiað tó fela for heora heardheortnysse wið þone Hǽlend, Hml. S. 25, 529. heardheortness,heard-heortness