Stræcness

According to the Old English Dictionary:

e ;

stræcness

f. Persistence, perseverance, pertinacity :--Mid unáter-iendlíc[r]e strecnysse indefessa instantia (perseverantia), Hpt. Gl. 434, 24. Hí mid ánrǽdnesse and mid strecnesse geearnodon heofona ríce, L. Ælfc. P. 13 ; Th. ii. 368, 29. stræcness