adj. honorable
adv. honorably
n. honor
v. to honor, make or become honorable

Dovahkiin, Dovahkiin, naal ok zin los vahriin, wah dein vokul mahfaeraak ahst vaal!
Dragonborn, Dragonborn, by his honor is sworn, To keep evil forever at bay!
(Book, Songs of Skyrim)

Not until introductions are complete. Zin. Heyv. Test your Thu'um against mine, Dovahkiin!
Zin = honor, heyv = duty
(Paarthurnax, 0003F9E6)

No day goes by where I am not tempted to return to my inborn nature. Zin krif horvut se suleyk.
Zin krif horvut se suleyk. = “Honor (is) fighting the lure of power”
(Paarthurnax, 0003C574)

Wah Krii ko morokei kein los wah zin geinmaar. Wah dir ko morokei kein los wah zin pah do Keizaal.
To Kill in glorious war is to honor oneself. To die in glorious war is to honor all of Skyrim.
(Word Wall for Krii, Marked for Death)

Central to ancient Nordic warrior culture, associated with loyalty and victory. For dragons, pertains to the following of ancient rite, abiding by the rule of strength.

Possibly related to zii ‘spirit’.