IPA: /ɪnˈsɪk.lɪ.kəl/
KK: /ɛnˈsɪk.lɪ.kəl/
Relating to a letter or document that is intended for wide distribution, often addressing a group or community.
The pope issued an encyclical to discuss important moral issues affecting society.
A formal letter written by the Pope to address important issues or teachings to bishops and the Church.
The Pope issued an encyclical to discuss the importance of environmental protection.
Encyclical → It is formed from "en-" (meaning in or within) and "kyklos" (from Greek, meaning circle) and "-ical" (meaning pertaining to). The word refers to a letter or document that is circulated within a circle of people, particularly in a religious context.
Think of a letter that is sent 'within' a 'circle' of people — that's why an encyclical is a document shared among a community.