Antidisestablishmentarianism is a historic term opposing state withdrawal from churches, now mainly known as a linguistic curiosity.

Antidisestablishmentarianism exists as a term that describes people who oppose the state to stop supporting the established church, which includes the Church of England.
The word originated in 19th-century Britain during debates over whether the Church of England should remain the state church. The word consists of three components, which include anti (against), disestablishment (removal of state support), and -arianism (belief or doctrine), which together create one of the longest English words that people commonly use.
Phonetic: an-tee-dis-uh-stab-lish-men-TAR-ee-uh-niz-um
IPA: /ˌæn.taɪ.dɪs.əˌstæb.lɪʃ.mənˈtɛə.ri.ə.nɪ.zəm/
The term exists today as a vocabulary element that people study instead of using it to express their political beliefs. The subject remains significant because it deals with issues that include the separation between religion and state, the rights of people to believe, and the operation of secular governments in democratic nations throughout the world.
Antidisestablishmentarianism played a key role in British political debates during the 1800s. The word exists as a teaching tool in English classes because it shows students how to create complicated words. The term exists as a long word that functions as a term to describe a specific historical belief. Most people know the word, yet they do not grasp its complete meaning.
The word Antidisestablishmentarianism demonstrates how historical events and political matters and linguistic developments combine to produce lengthy words that maintain their deep significance.