rig·or·ous 
/ˈrɪgərəs/ adjective
/ˈrɪgərəs/ adjective [more rigorous; most rigorous] 1 : very strict and demanding
▪ rigorous enforcement of the rules ▪ rigorous training ▪ a rigorous course of study 2 : done carefully and with a lot of attention to detail
▪ We subjected the data to a rigorous analysis. ▪ a rigorous investigation 3 : difficult to endure because of extreme conditions
▪ a harsh, rigorous climate
▪ rigorous enforcement of the rules ▪ rigorous training ▪ a rigorous course of study
▪ We subjected the data to a rigorous analysis. ▪ a rigorous investigation
▪ a harsh, rigorous climate
— rig·or·ous·ly adverb
▪ The rules must be rigorously followed. ▪ The data was rigorously analyzed.
▪ The rules must be rigorously followed. ▪ The data was rigorously analyzed.
— rig·or·ous·ness noun [noncount]
