Lewis Short
(adjective) : sup-pernātus (subp-), a, um, perna
* Lamed in the hip: suppernati dicuntur, quibus femina sunt succisa, in modum suillarum pernarum. Ennius in Annalibus: is pernas succidit iniquā superbiā Poeni. Et Catullus (17, 19) alnus suppernata securi,cut down,Fest. p. 305 Müll.; cf. p. 304 ib.
Charlton T. Lewis, Charles Short, A Latin Dictionary