fire-setting1
/ˈfʌɪəsɛtɪŋ/noun
1The softening or cracking of a rock face to facilitate excavation, by exposing it to a wood fire built close against it.
2The action or practice of starting a fire; especially the setting of fires as a malicious or criminal act; arson.
Origin
Early 19th century. From fire + setting.
fire-setting2
/ˈfʌɪəsɛtɪŋ/adjective
That starts a fire; especially that sets fires as a malicious or criminal act.
Origin
Mid 19th century; earliest use found in Cobbett's Weekly Political Register. From fire + setting, present participle of set.