prep. of, from, belonging to; made up of, consisting of, characterized by; about

Huzrah nu, kul do od, wah aan bok lingrah vod, Aahrk fin tey, boziik fun, do fin gein!
Hearken now, sons of snow, to an age, long ago, and the tale, boldly told, of the one!
(Book, Songs of Skyrim)

Het nok Faal Vahlok, deinmaar do Dovahgolz ahrk aan Fus do unslaad rahgol ahrk vulom.
Here lies The Guardian, keeper of the Dragonstone and a Force of eternal rage and darkness.
(WOrd Wall for Fus, Unrelenting Force)

Nonvul Bron, dahmaan daar rok do fin Fodiiz Bormah - Nii los heyv do enook mun wah lahney voth ahkrin ahrk zin, leh rok Feim vodahmin kotin vulom.
Noble Nord, remember these words of the Hoar Father – It is the duty of each man to live with courage and honor, lest he Fade unremembered into darkness.
(Word Wall for Feim, Become Ethereal)

More common in writing than in speech.

Likely inspired by de "of/from" in many languages including Latin, French, Irish, and Portuguese.