名词

1. (总是煽动事端的)狂热分子;(尤指)政治煽动者
If you describe someone as a firebrand, especially someone who is very active in politics, you mean that they are always trying to make people take strong action.

1. someone who deliberately foments trouble

e.g. she was the instigator of their quarrel

Synonym: instigatorprovokerinciterinstigant

2. a piece of wood that has been burned or is burning

Synonym: brand