Kemeroi (KEM-er-oy) are powerful entities related to Shadows and the Nameless.
Articles mentioning the Kemeroi:
Aerfalle's Letter, To Raise a Banner of Flame:
Translator's note: There is a word early in this text which defies easy conversion from Dericostian to Roulean. This I have rendered as "kemeroi," a direct phonetic equivalent of the original word.
Established lore has shown me this word used to describe an unprecedented number of circumstances, most of which are contradictory. By turns, kemeroi is used to express the concepts of stillborn offspring, unwelcome emissary, unseen or stealthy movement, corrupter or tempter, nightmare, madness or terrifying hallucination, unbidden thought, parasite, scream uttered
at awakening from a nightmare, thing that causes melting, liquid given form by a vessel, the touch of something frozen, and night that moves as a liquid.
The latter few of these many meanings are the most curious, as kemeroi is not a word of the so-called "Great Tongue" of Dericost, but rather the Base Tongue. The Great Tongue, with roots in the archaic dialect of the Falatacot, was used by the artisans as well as the aristocracy (and for that reason some of its words came into use by the Yalaini intelligencia).
This, I feel, implies that descriptions such as "liquid night" are not merely poetic license, but literal description. At any rate, the context here seemed to indicate use of the word as a proper name. Of the definitions cited above, perhaps "unwelcome emissary" would work best.
...
I regret I must send ill tidings, love. The dark spawn have now appeared in my cellars as well, below the levels infested by Asheron's vermin. They are older than the ones that trouble you, I believe; Uvriliim and Paanuvriliim. Fortunately, the Kemeroi still sleep. Should they appear again, I think the dark ones would cease to toy with the outlander hoard that vexes Killiakta. They would quickly be absorbed.
...
That dark, perilous mist the Servant wrested from the kemeroi rolled over the land from horizon to horizon. The skirls of pitch vapor withered and fused whatever plant, earth, or flesh they touched.
Pack Grael, Shattering the Dark:
A miniature doll of Grael, the Heart-Render, Black Spear of the Kemeroi, Scourge of Haebrous, and Rage of Shadow.
A miniature doll of Aerbax - once a valued member of the Virindi Singularity who split from it and gradually began to realize its own independence. Its research culminated in the discovery of a Kemeroi, one of the great evil beings hidden deep within the world, which further twisted it towards Shadow and destruction.