Preach (verb)

1. To deliver a sermon or religious address to an assembly of people, typically in a church.
2. To advocate or exhort others to adopt a particular belief or course of action.
3. To talk excessively or dogmatically on a subject.

Origin:

From middle english prechen, from old english prēcan ("to speak, tell, proclaim, preach"), from proto-germanic *prekōną ("to speak, tell"), from proto-indo-european *prek- ("to spea.k")

Examples:

1. He preached to the congregation about the importance of forgiveness.
2. She preached the gospel to the poor.
3. He preached against the dangers of alcohol.
4. She preached the virtues of recycling.
5. He preached the need for change in the society.