The root of the matter lay in our ignorance and lack of experience.

The roots of the problem lay deeper in changing economic and social circumstances.

The project's roots lay in scientists' fears since 1967 that India was also developing nuclear weapons of its own.

The root of the split, though, lay in the nature of the two men's attachment.

As with the Internet itself, the Web's roots lay in the late 1960's.

On the rock's flat surface lay a root, wet, covered with small open spores.

Big roots hidden beneath the grass lay often in the way.

The root of Joe's frustration lay in the fact that his brothers were not around.

It seemed somehow deeper, as if its roots lay hidden in the past.

Something had gone wrong, and the root of the problem lay hidden in darkness.