Orc

In the Old English poem Beowulf a compound orc‑nēas (plural orcneas) appears in a catalogue of monstrous peoples alongside elves and giants and is interpreted by scholars as linked to Latin Orcus and Gothic/Old Norse terms for corpse, yielding possible senses like 'demon‑corpses' or underworld/necromantic beings. J. R. R. Tolkien adopted and adapted the term for his subcreation: he drew on Old English orc ('demon'/'ogre') for phonetic and thematic resonance, devised Elvish etymologies (e.g., ruku), and presented orcs as a race bred or corrupted to serve Morgoth, Sauron and other dark powers in his legendarium.

Across the sources summarized, orcs are humanoid in shape with considerable variation in size and form. Typical depictions in Tolkien's fiction describe them as ugly, filthy, often bow‑legged, long‑armed and fanged; many early breeds are relatively small and avoid daylight, while later breeds such as Uruk‑hai are larger, stronger, and can endure sunlight. Half‑orcs and other hybrid forms are described in Tolkien's texts as man‑high with goblin‑like faces in some accounts.

Orcs in Tolkien's narratives function as organized, warlike fighters serving dark lords; they exhibit physical ferocity, endurance, and capacity for massed military action. Many early varieties shun daylight, while later bred strains (Uruk‑hai) lack that limitation. Cannibalistic tendencies are reported or suggested in the narrative. Tolkien's materials also depict interbreeding with Men producing half‑orcs; linguistic notes indicate orcish groups in his fiction employ pidgins and varied names rather than a single unified tongue.