Lewis Short
(verb) : prae-vēlo, āre
* To veil or cover over; to conceal by placing before (late Lat.): flammea praevelatura pudorem,Claud. Rapt. Pros. 2, 325: praevelans fronde secures,id. VI. Cons. Honor. 647: amnem Tiberis domibus amoenis,id. Laud. Stil. 2, 189.
Charlton T. Lewis, Charles Short, A Latin Dictionary