rigorous

A level of quality that is high and difficult to achieve.

Refers to research conducted with extreme care and precision.

A test that is very difficult and accurately measures someone's ability or a product's quality.

A training program that is very demanding and thorough.

A process of judging something's quality or importance in a detailed and careful way.

Describes critical and thorough examination of something.

Indicates a very strict and controlled way of behaving or working.

Used to describe a very thorough and careful check of something.

Refers to a challenging and demanding course of study.