Meaning

verb cause to start burning; subject to fire or great heat

verb start to burn or burst into flames

verb arouse or excite feelings and passions

originFrom Latin ignītus, past participle of igniō, ignire (“to set on fire, ignite”), from Latin ignis (“fire”), from Proto-Indo-European *h₁n̥gʷnis, and thus related to Sanskrit अग्नि (agní), Lithuanian ugnis, and Russian ого́нь (ogónʹ).

Etymology from Wiktionary, CC BY-SA 3.0