To introduce or preface, often in a way that sets the stage for something more significant.

पूर्वसूचना देना

English Usage: The author decided to preludize the main themes of the book in the introduction.

Hindi Usage: लेखक ने पुस्तक की भूमिका में मुख्य विषयों की पूर्वसूचना देने का निर्णय लिया।