Plainly
look up a word, understand it — no rabbit hole
terrorism
nounTEH-ror-iz-um
meaning in plain English
Using violence or threats to scare people and force them to do what you want for a political or social cause.
for example
The bombing was an act of terrorism meant to frighten the whole city into changing its laws.
Imagine someone blows up a bus just to make everyone afraid to ride buses anymore. That’s terrorism—using fear as a weapon to push their own goals, no matter who gets hurt.