Lewis Short
impĕdītĭo | inp- (noun F) : (), , impedio
* A hinderance, obstruction (rare but class.): sine impeditione praeterire,Vitr. 1, 5: animus in somniis liber est sensibus et omni impeditione curarum, etc.,Cic. Div. 1, 51, 115; Arn. 2, 52.
Charlton T. Lewis, Charles Short, A Latin Dictionary