//When Words are Necessary

"... During this period El Lissitzky proceeded to develop a suprematist style of his own, a series of abstract, geometric paintings which he called Proun (pronounced "pro-oon"). The exact meaning of "Proun" was never fully revealed, with some suggesting that it is a contraction of proekt unovisa (designed by UNOVIS) or proekt utverzhdenya novogo (Design for the confirmation of the new). Later, El Lissitzky defined them ambiguously as "the station where one changes from painting to architecture."