seven: [OE] The Indo-European term for ‘seven’ was *septm. This evolved into Latin septem (source of English September), Greek heptá (source of English heptathlon [20]), and Germanic *sebun. And *sebun in turn has diversified into German sieben, Dutch zeven, Swedish sju, Danish syv, and English seven. => heptathlon, september[seven etymology, seven origin, 英语词源]