Ge-treówleásnes

According to the Old English Dictionary:

-ness, -nys, -nyss, e;

ge-treówleásnes

f. Infidelity, perfidy; perfidia :-- Hí þrowedon heora getreówleásnesse suæ perfĭdiæ pænas luēbant, Bd. 5, 23; S. 645, 34. For heora getreówleásnysse for their perfidy, 2, 2; S. 504, 9: 1, 8 ; S. 479, 34. ge-treowleasnes