IPA: //ˈɡluːtəˌhaɪmaɪd//
KK: /glutˈɛθɪmaɪd/
A type of medication used to help people sleep or relax, which is not a barbiturate and has similar effects to them.
The doctor prescribed glutethimide to help the patient with severe insomnia.
Glutethimide is formed from "glut-" (from the Latin "glutire", meaning to swallow) and "-ethimide" (a suffix used in the names of certain drugs, derived from the chemical structure). The word refers to a drug that is taken or 'swallowed' for its effects.
Think of 'swallowing' ('glut-') a medication that has a specific chemical structure ('-ethimide') — that's how glutethimide works as a drug.
No commonly confused words.