Sentence:  In this great University of Michigan, in its faculties and among its students are children of every state in the Union, teachers from Britain and from Europe, scholars from the Near East and from the Far East, and as from a fountain head the streams are turning again to vitalize and <WSD>fruitify</WSD> the world. 
Meaning of the word marked with <WSD> tags:  To make fruitful; to enrich.