v. to fade
n. fade

Feim zii gron!
Fade spirit bind!
(Become Ethereal Shout)

“Fade” in your tongue. Mortals have greater affinity for this Word than the dov. Everything mortal fades away in time, but the spirit remains. Ponder the meaning of spirit. Unslaad zii. Where mortal flesh may wither and die, the spirit endures. That is “Feim.” Let that meaning fill you. Su'um ahrk morah. You will find that your spirit will give you more strength.
(Paarthurnax, 000E8274)

Nii los heyv do enook mun wah lahney voth ahkrin ahrk zin, leh rok Feim vodahmin kotin vulom.
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)

Word of Power, connototes mortality and ephemeralness. What fades away is not as significant as what is left behind.