Sermonize
Sermonize , intransitive verb
1.
To compose or write a sermon or sermons; to preach.
2.
To inculcate rigid rules. [Rare] — Chesterfield
Sermonize , transitive verb
To preach or discourse to; to affect or influence by means of a sermon or of sermons. [Rare]
Which of us shall sing or sermonize the other fast asleep?