pyromania
词根词缀：
词根
pyr(o)= fire 火
pyre n. （火葬用的）柴堆
pyr 火 + e → 用来烧火的柴堆 → 柴堆
pyromania n. 纵火狂
pyro 火 + mania …狂 → 纵火狂
后缀
-mania 表名词，“…癖，…狂”
monomania n. 偏狂症，狂热病
mono 单个 + mania …癖，…狂 → 为一件事而狂热 → 偏狂症
pyromania n. 纵火狂，放火癖
pyro 火 + mania …癖，…狂 → 纵火狂，放火癖
数据来源：新东方英语词汇速记大全
相关例句：
Objective To analyse the characteristics of pyromania with mental disorder and relative factors.
目的探讨精神障碍者纵火行为及相关因素之特征。
Methods The individual information, psychogenic data of 44 pyromania with mental disorder were analysed.
方法分析44例精神障碍者的纵火行为。
The person arrested for setting the fire had been suspected of pyromania on two previous occasions.
那个因纵火被捕的人，先前有过两次纵火的嫌疑。
The fourth of July domestic culinary pyromania is followed by community pyrotechnics.
七月四日，人们在家里食完人间烟火，接下去就是社区的烟花会。