1. Labyrinthine (adj.): Like a labyrinth; complex, intricate, confusing. (Refers to the actual Labyrinth, but also to the complex plot and situations within the story.)
2. Promethean (adj.): Boldly creative and original; defying authority. (Refers to the Titan Prometheus, who stole fire from the gods, and is a characteristic of certain characters in the book.)
3. Nemesis (n.): A formidable and usually victorious rival or opponent. (Refers to the antagonist or a character's greatest challenge.)
4. Inscrutable (adj.): Difficult to understand or interpret. (Describes characters or events that are mysterious or enigmatic.)
5. Ephemeral (adj.): Lasting for a very short time; fleeting. (Relates to the temporary nature of certain events or situations.)
6. Augur (n.): Someone or something that foretells the future. (Relates to prophecies and divinations, a recurring element in the story.)
7. Cunning (adj.): Clever and deceptive; sly. (Describes characters who utilize their intelligence and deception for their own advantage.)
8. Precipitous (adj.): Steep, dangerously high. (Describes the perilous environment of the Labyrinth, as well as the characters' risky choices.)
9. Exacerbate (v.): To make worse; to aggravate. (Describes how events or actions worsen the overall situation and danger.)
10. Sacrosanct (adj.): Extremely sacred; inviolable. (Refers to the importance and sacredness of certain places, objects, or individuals within the story.)