FreeVocabulary
Rigorous
/ˈrɪɡ.ər.əs/ adjective easyExtremely thorough, strict, and demanding in method or standards.
The lab required a rigorous testing process before any new drug could move to human trials.
Memory Trick
Related to 'rigor,' as in rigor mortis — a rigorous process is so exacting and unbending it leaves no slack anywhere.