Navigation, communication, and observation all are rendered difficult by the nature of hyper-space.

Computer data has not been destroyed, merely rendered difficult to access.

Our task had been rendered more difficult by the fact that the legal documents of ownership were in another name.

Contacts were positive, but rendered difficult by enormous distances.

Extraction of the copper resources was rendered difficult by navigation difficulties at the river's mouth.

Campaigning was rendered difficult by the sheer size of the constituency.

This assignment was rendered all the more difficult because the fire-lizards seemed to want to look him straight in the eye.

Enquiries rendered more difficult, of course, by Geoffrey's communication problems.

The rescue, rendered more difficult by the vile weather, took two trips.

Since Richter's brilliant season last year was really his first, the negotiations and evaluations have been rendered more difficult.