in·cen·di·ar·y 
(ĭn-sĕndē-ĕr′ē)
(ĭn-sĕndē-ĕr′ē)adj.
1.
a. Causing or designed to cause fires: an incendiary device.
b. Of or containing chemicals that produce intensely hot fire when exploded: an incendiary bomb.
c. Intentionally started or set: an incendiary fire.
2. Tending to arouse strong emotion or conflict; inflammatory: an incendiary speech.
3. Causing a strong burning sensation in the mouth; very hot: incendiary wasabi.
n. pl. in·cen·di·ar·ies
1. An incendiary bomb, bullet, or device.
2. A person who intentionally starts a fire with the purpose of causing damage or injury.
3. One who creates or stirs up conflict; an agitator.
[Middle English, from Latin incendiārius, from incendium, fire, from incendere, to set on fire; see INCENSE1.]
in·cendi·a·rism (-ə-rĭz′əm) n.