rigorosamente bedeutet auf Englisch

formally▼(in accordance with rigorous rules)
adverb
[UK: ˈfɔːm.l̩.i] [US: ˈfɔːrm.l̩.i]

rigorously▼(in a rigorous manner)
adverb
[UK: ˈrɪ.ɡə.rə.sli] [US: ˈrɪ.ɡə.rə.sli]