Английский Этимологический словарь - express (v.)

- c.1380, from M.L. expressare, freq. of exprimere "represent, describe," lit. "to press out" (perhaps via an intermediary sense of something like "clay that takes form under pressure"), from ex- "out" + pressare "to press, push," from L. primere. The adj. is from L. expressus "clearly presented," pp. of exprimere; and it led to the n. (first attested 1619) meaning "special messenger." Sense of "business or system for sending money or parcels" is 1794. An express train originally ran to a certain station. Expressionism in the mod. sense of the word is 1908.