The word "enthlasis" is a rare term that refers to the stress or emphasis placed on a particular syllable or word in speech. Its spelling can be explained with the help of the International Phonetic Alphabet (IPA), which uses symbols to represent sounds. In IPA, "en" is pronounced as /ɛn/, "thla" as /θlə/, and "sis" as /sɪs/. Put together, the word is pronounced as /ɛnˈθləsɪs/. Although not commonly used, understanding the spelling and pronunciation of "enthlasis" can enhance one's language skills.
Depressed fracture of the skull.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.