IPA: /ˌæntɪˈklɛrɪkəlɪzəm/
KK: /æntiˈklɛrɪkəlɪzəm/
A belief or movement that opposes the influence of religious leaders in politics.
The rise of anticlericalism in the 19th century led to significant changes in government policies regarding religion.
Anticlericalism is formed from "anti-" (meaning against) and "clerical" (from Latin "clericalis", meaning relating to the clergy). The term refers to a movement or ideology that opposes the influence or power of the clergy in political or social matters.
Think of being 'against' ('anti-') the 'clergy' ('clerical') — that's what anticlericalism means.