Endoctriner

Part of speech: noun, verb

Definitions

1. A person who teaches or instills a particular doctrine, ideology, or belief system into others, especially in a thorough or dogmatic way
2. Someone who systematically instructs others to accept and adopt specific ideas, principles, or viewpoints without critical questioning
3. An individual who imparts a fixed set of beliefs or teachings to people, often with the goal of ensuring unquestioning acceptance

Etymology: In-doctrinate comes from Medieval Latin "indoctrinare," "to instruct," built from the Latin prefix "in-" and "doctrina," meaning teaching, which also gave English "doctrine." The core idea is of pouring teaching into someone, and the sense of a fixed set of beliefs being imposed came later. "Endoctriner" is an unusual spelling, and it is best understood as a variant of "indoctrinator," the person who indoctrinates. English has many words where "en-" and "in-" were used interchangeably, and "endoctrine" appears as an older spelling of the verb. The agent ending "-er" simply marks the person doing the teaching. Beyond that spelling, the word's specific history is not well documented, so its exact path into English is uncertain.