Combine carries a hidden number inside it. The -bine ending descends from Latin bini, meaning 'two by two' or 'in pairs,' related to bis (twice) and ultimately to the Proto-Indo-European root for 'two.' Late Latin combinare therefore meant something precise: to put things together in pairs, to couple them. When Middle English borrowed the word in the 15th century, the pairing sense was already fading in favour of general joining, and modern English has lost any trace of the 'two' that once lived inside the word. The noun combine developed two distinct modern meanings in the 19th century. A combine harvester (1830s) was a machine that combined reaping and threshing into one operation. A business combine (1880s) described firms that joined forces — often with monopolistic intent, giving the word a faintly sinister edge. Whether describing a farm machine or a corporate merger, combine still does what its Latin ancestor promised: it puts things together, even if no one counts the pairs any more.