ex-ăpĕrĭo — Lewis & Short
ex-ăpĕrĭo, īre, v. a.,
I 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.