IPA: //ˌfiːnəʊˈbɑːbɪtəʊn//
KK: /fɛnəˈbɑrbɪˌtoʊn/
A medication used to treat seizures and as a sedative, belonging to a class of drugs known as barbiturates.
The doctor prescribed phenobarbitone to help control the patient's seizures.
Phenobarbitone → It is formed from "pheno-" (from Greek "phainō", meaning to show or to appear) and "barbitone" (derived from "barbituric acid", which is a compound related to the sedative effects of the drug). The word refers to a compound that shows sedative properties, derived from barbiturates.
Think of 'pheno-' meaning to 'show' or 'appear', which helps you remember that phenobarbitone is a drug that shows sedative effects.
No commonly confused words.