" The sense of differentiation is so acute in Yiddish that a word like, say, paskudnyak has no peer in any language I know for the vocal delineation of a nasty character. And Yiddish coins new names with ease for new personality types: a nudnik is a pest; a phudnik is a nudnik with a Ph.D. "

― Leo Rosten , The New Joys of Yiddish: Completely Updated