"Scleromeninx" is a medical term used to describe inflammation and hardening of the meninges, the protective membrane surrounding the brain and spinal cord. The word is pronounced as /sklɛrɵˈmɛnɪŋks/ which breaks down into four syllables: "skler-" which means hard, "-o-" which connects roots, "-meni-" meaning meninges, and "-nx" as a suffix. The spelling of "scleromeninx" reflects the Greek roots of the word and may pose a challenge to non-medical professionals unfamiliar with its pronunciation and meaning.
Dura mater, pachymeninx.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.