The word "thyremphraxis" is a rarely used medical term that is spelled phonetically as /θaɪˈrɛmfræksɪs/. The initial "thy" sound is pronounced as the Greek letter theta, which represents the "th" sound. The "remp" part is pronounced with a short "e" sound, followed by an "m" sound. The "ph" in "phraxis" represents the "f" sound, while the "x" is pronounced as "ks". In simpler terms, the word describes the blockage of the thyroid gland's ducts – something you probably won't hear in everyday conversations.
Diminished or arrested function of the thyroid gland.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.