noun
preacher; evangelist
Refers to a person who delivers sermons, especially in a Christian context, but can also be used more broadly for a moralizing speaker.
彼は教会の説教師として有名だ。
He is famous as a preacher at the church.
あの説教師の話はいつも心に響く。
That preacher's talks always resonate with me.
伝道師 is a missionary or evangelist focused on spreading the faith, often with a more active outreach connotation than 説教師.
Compound of 説教 (sermon, preaching) and 師 (master, teacher). The exact historical derivation is uncertain, but the word follows a common pattern for titles of specialists.