Dóm-fæstnes

According to the Old English Dictionary:

-ness, e;

dóm-fæstnes

f. [fæstnes firmness] Firmness of judgment, judgment; jūdĭcii integrĭtas, jūdĭcium :-- Mildheortnessa and dómtæstnes ic singe miserĭcordiam et jūdĭcium cantābo, Ps. Lamb. 100, 1. dom-fæstnes