It actually means "Unending Sorrow."
"Krosis" can mean both "sorry" (as Paarthurnax uses it) and "sorrow," apparently.
Otherwise we'd have a Dragon Priest named "Sorry."
It would seem like Paarthurnax's usage is less literal than elsewhere.
The word wall for the last word of Storm Call uses it thus:
Qethsegol vahrukiv sahsunaar
Do daniik vundeheim
ag Nahlaas naal qo do Unslaad krosis
(This) stone commemorates (the) villagers of doomed Vundeheim, burned alive by (the) Lightning of Unending Sorrow.
As for draugr being held against their wishes, there's some lore on a researcher who managed to gain their trust and infiltrate them .
They seem more fiercely territorial than anything.
gaming.stackexchange.com/users/14402/brymck
[Not a complete answer, but too big to be a comment.]
Unslaad Krosis , literally means, "Eternal sorrow", according to UESP , and the lore page on draugr confirms that they do indeed say it.
However, the draugr were in life the servants of dragon priests, and upon their priest's death they would be entombed with him as his eternal servants and guardians; there appears to be nothing unwilling about it, and the lore article even specifically debunks the common Nord misconception that draugr are cursed.
Draugr are, in fact, the undead servants and guardians of their immortal dragon priests.
This leads me to conclude that they are not, in fact, apologizing to the Dovahkiin as they attempt to disembowel him/her, especially alongside another common phrase listed in the aforementioned lore article, Daanik Ah Dov , or "Doomed dragonhunter", which appears to clearly be a threat.
I cannot, however, offer a clarification of the meaning of Unslaad Krosis in the context of the draugr mutterings, other than to offer my personal observation that dragon language appears to be at least somewhat idiomatic, and that oftentimes words seem to have deeper philosophical meanings than what a direct English translation would suggest.
gaming.stackexchange.com/users/9342/Kromey
They are just being sarcastic.....
"Really sorry
but im gonna have to kill you now"
gaming.stackexchange.com/users/19735/Lofahkin
Krosis is a dragon priest.
Unslaad means Eternal or Immortal.
They say Immortal Krosis.
gaming.stackexchange.com/users/42048/Çağatay
This also caught my attention the first few times I heard it.
As I understood it, they were apologizing profusely for attacking, and that confused me.
I kind of thought that it was against their will, like the ghosts at that one place (I can't remember it right off the top of my head) where they say things such as
, "I'm sorry!
This isn't what I want!"
But like the lore explains, the draugr were willing to worship dragons and the such, in life AND in death.
Maybe they say it right before they are about to die for real, as an apology to those they worship.
Like, "sorry, I'm about to be slashed by this guy, so I can't worship you anymore.
"
-shrug- that's just what I think.
gaming.stackexchange.com/users/55231/Laddy M.
Immortal Sorrow, in Nordic speech and speech native to Nordic legends sorrow was a past tense of sorry.
Draugr are enslaved Nords, who were enslaved by the dragon priests during their lives to commit unspeakable horrors in the names of the world eater Alduin against their will.
As a result it was thought that the gods, aka the Nine Divines, cursed them for their cowardice for not resisting the will of the dragon priests and the dragons.
As far as the doomed dragon hunter thing goes, it is probably a reference to the Blades, as in the draugr in particular that states it was probably a blade in the past enslaved by certain circumstances by the dragon priests for whatever reason.
Krosis was one of the main and most powerful dragon priests, and more often than not the ancient catacombs that you will find throughout Skyrim, and Solstheim (even those that do not have dragon priests in them)
will most likely reference Krosis, as their enslaver.
And even if that be the case I referenced the game to be sure and found that this is what the draugr are actually saying "Un unslaad Krosis".
There is an extra "un".
I listen to the media I recorded multiple times and even slowed it down to make sure.
There is an extra "un", which changes the meaning quite a bit.
It translates literally as Our unending sorrow, which shows us that they are indeed doing this against their will.
Their minds and souls are still intact, but their bodies are what is being controlled.
In Conjuration you learn that the mind and soul are separate entities, and without restoring a portion of the soul you cannot use reanimation spells, and without restoring the mind your reanimated corpses cannot attack, but you control their bodies in actuality, like a puppet master.
Seriously you should read the books in the Arcaneum on conjuration.
it explains it all.
I hope this helps.
gaming.stackexchange.com/users/99227/Unahzaal Vozahlaas Lokaal.
I'm not entirely familiar with the topic but after reading all the attempted answers and comments I think it's fairly obvious they mean "
long live Krosis".
After studying a few languages I find that literal translations can lead you astray from the intended meaning.
gaming.stackexchange.com/users/101306/Kaneda
Draugr sometimes say "Unstaad Krosis" when attacking. I understand that means "many apologies" in dragon tongue (convo with Paarthurnax).   Does this hint that they are doing something against their wishes?
Are the Draugr apologizing to me?
gaming.stackexchange.com
<the-elder-scrolls-5-skyrim>
gaming.stackexchange.com/questions/49817
gaming.stackexchange.com/users/16125/Aditya M P
It means unending or eternal sorrow. While there are documents to help with the translation, regarding the languages included in Skyrim, the current phrase can have a variety of meanings.
It is implied that there is a different meanig behind the phrase in question.