* Adjective: Meaning "tending to cause fires," "likely to cause anger or violence," or "extremely passionate or exciting."
* Example: "The speaker's incendiary speech sparked protests."
* Noun: Meaning "a person who starts fires," "a bomb or weapon designed to start fires," or "something that is highly flammable."
* Example: "The suspect was accused of using an incendiary device."
The specific part of speech will depend on its usage in the sentence.