In this case, reports have come in that Lamborghini has registered the name "Aventador" with the U.S. trademark office. The name has a number of divergent translations – including, appropriately, Spanish slang for kicking @$$ – but the most pertinent could be that of a thousand-pound Spanish bull that legendarily fought in and was named the bravest of the Plaza de Toros de Zaragoza.
Whatever the meaning behind the name, we're more interested in what it will adorn. The most likely scenario is that Aventador will be the name of the upcoming Murcielago successor, coupled with the alphanumeric LP700-4 designation. Alternatively this could be used for the limited-production version of the Sesto Elemento concept, though that seems more likely to retain its name. Of course, it could be destined for something else entirely, or nothing at all. We'll just have to sit tight and see.