He wrote in the High Style, after bellow, and declared war on cliché.
You mentioned bellow earlier and you have written about what you consider the professorial element in his novels.
I've reviewed bellow and Vonnegut, but I basically have tried to avoid it.
apparently from Old English bylgan "to bellow," from PIE root *bhel- (4) "to sound, roar." Originally of animals, especially cows and bulls; used of human beings since c.1600. Related: Bellowed; bellowing. As a noun from 1779.