Hypertarachia is a medical term used to describe an overactive thyroid gland. The word is pronounced as /ˌhaɪpəˌtɛrəˈkaɪə/ and is spelled using the combination of the prefix "hyper," meaning excess or overactivity, and the root "tarach" or "thyr," meaning thyroid. The addition of the suffix "-ia" denotes a medical condition or state. Although the spelling of this word may seem daunting at first, understanding the root and prefix can make it easier to remember and pronounce correctly.
I apologize, but I couldn't find any information on the term "hypertarachia". It is possible that it may be a misspelled or lesser-known term. Is there another term or topic you would like assistance with?
Exaggerated irritability of the nervous system, regarded as the underlying cause of tetanus.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.