IPA: /nəˈlɔːrfiːn/
KK: /nælɔrˈfin/
A medication that is derived from morphine and is used to help with breathing problems caused by narcotic overdoses.
The doctor administered nalorphine to reverse the effects of the overdose.
Nalorphine is formed from "nal" (a modification of the chemical name for the compound) and "orphine" (from the Greek "orphinē", meaning morphine). The word refers to a synthetic derivative of morphine used as a pain reliever and to counteract the effects of morphine overdose.
Think of 'orphine' as relating to morphine, and remember that nalorphine is a modified version used to counteract morphine's effects.