Английский Этимологический словарь - conversation

- 1340, from O.Fr. conversation, from L. conversationem (nom. conversatio) "act of living with," prp. of conversari "to live with, keep company with," lit. "turn about with," from L. com- intens. prefix + vertare, freq. of vertere (see convert). Specific sense of "talk" is 1580. Used as a synonym for "sexual intercourse" from at least 1511, hence criminal conversation, legal term for adultery from late 18c.