rigorous

Glenn’s training was very rigorous, including his physical fitness.

You can’t read this lengthy and rigorous article, or much of anything else about Spain under Franco, without feeling the shock of recognition: Yeah, this is what they want.

The financial reforms in the early 2000s fundamentally changed vendor financing practices, with enhanced disclosure requirements and more rigorous accounting standards.

Nuclear operators go through rigorous control measures to make sure they don’t carry radioactive dust out of the plant at the end of a workday.

The model would change July 1, 2006, the announcement said, but all the subprime bonds issued before that date would be rated by the old, presumably less rigorous, model.