He has not been able to determine the origin of its name.

The origin of the fire has not yet been determined.

The campaign led to efforts by state officials to determine the origin of the cash.

She listened, trying to determine the origin of the sound she'd heard.

I believe we may have the means to determine the origin of the explosion.

The center did not answer the question, but found a company to sample the material and determine its origin.

To date, we have not been able to determine the origin of the money used for the 9/11 attacks.

The origins of the leak had not been determined, he said.

The origin of the shooting could not be immediately determined.

I mean, the coroner's report wouldn't have been able to determine the origin.