Rigour

And the Lord said to him: I have seen the affliction of my people in Egypt, and I have heard their cry because of the rigour of them that are over the works.

The experiment must be conducted with rigour.

The student's essay was lacking in rigour.

The scientist conducted the experiment with great rigour to ensure accurate results.

First, it is my desire to give expression to that rational view of the world which is being forced upon us with such logical rigour by the modern advancements in our knowledge of nature as a unity, a view in reality held by almost all unprejudiced and thinking men of science, although but few have the courage (or the need) to declare it openly.

The student's essay lacked rigour.

And the Egyptians made the children of Israel to serve with rigour: And they made their lives bitter with hard bondage, in morter, and in brick, and in all manner of service in the field: all their service, wherein they made them serve, was with rigour.