The original camming units had rigid aluminum-bar stems, but flexible-cable stems now rule.

It had rigid whiskers, and the ears were nearly naked.

But Eugenia had rigid views of life and was not given to concealing them.

In the model, when the locusts had rigid or straight wings, flight performance suffered, the team found.

We knew it was risky, but we had rigid safety protocols to make sure nothing could go wrong.

He himself must have had rigid and faithful instruction at an early period of life, though probably not in his boyhood.