IPA: //ˌsɛkəˈbɑːrbɪtəl//
KK: /sɛkəˈbɑrbɪtəl/
A type of medication that is used to help people sleep or to calm them down. It is a white, odorless substance that belongs to a group of drugs called barbiturates.
The doctor prescribed secobarbital to help the patient with severe insomnia.
Secobarbital is formed from "seco-" (from Latin "secare", meaning to cut) and "barbital" (derived from "barbituric acid", which is a compound used in the synthesis of barbiturates). The term refers to a barbiturate that is derived from a compound that has been 'cut' or modified from its original structure.
Think of 'cutting' ('seco-') a compound to create a specific type of medication, which is what secobarbital represents.