IPA: /ˌdɛmənˈstreɪʃən/
KK: /dɛmənˈstreɪʃən/
A public event where people gather to show their opinions or beliefs, often through a rally or march, or a way to explain or show how something works.
The demonstration for climate change drew thousands of supporters from all over the city.
Demonstration → It is formed from "de-" (meaning down or away) and "monstrare" (meaning to show). The word refers to the act of showing or proving something clearly, often through examples or evidence.
Think of 'showing down' ('de-') something clearly ('monstrare') — that's why demonstration means to show or prove something.