Lewis Short
(verb) : ex-ăpĕrĭo, īre
* To open wide, throw open (very rare): exapertae repente delubri fores, et audita major humana vox,Tac. H. 5, 13: implicatissimam nodositatem,to undo, unloose,Aug. Conf. 10.
Charlton T. Lewis, Charles Short, A Latin Dictionary