She remained obdurant in her decision despite everyone's objections.

The obdurator is a rigid part of a sigmoidoscope.

She is obduring in her decision to quit her job.

The obdurance of the diamond makes it one of the hardest substances on Earth.

She is obdurating her decision to quit her job.

He obdurates his decision despite the opposition.

He obdurated his heart and refused to listen to any pleas.

The surgeon used obdurators to fill the defect in the patient's palate.

The obduredness of the stone made it difficult to break.