IPA: //ɛnˈsɪklɪk//
KK: /ɛnˈsaɪklɪk/
Relating to a letter or document that is sent to many people or places, often used in a religious context to address a wide audience.
The pope issued an encyclic letter to address important issues facing the church.
A letter sent by a pope to the bishops of the Church, often addressing important issues or teachings.
The pope issued an encyclic to address climate change and its impact on the world.
Encyclic → It is formed from "en-" (meaning in or within) and "cyclic" (from Greek "kyklos", meaning circle). The word "encyclic" refers to something that is circular in nature, often used to describe a letter sent around to multiple recipients within a circle of authority.
Think of something that is sent 'within' a 'circle' — that's why an encyclic is a letter that circulates among a group.