/dɪˈrɪvətɪvz/
noun
a word or thing that has been developed or produced from another word or thing 派生词；衍生字；派生物；衍生物
’Happiness’ is a derivative of ‘happy’.
happiness 是 happy 的派生词。
Crack is a highly potent and addictive derivative of cocaine.
强效纯可卡因是一种药效极强、容易使人上瘾的可卡因制剂。