rig ‧ or ‧ ous /ˈrɪɡərəs/ BrE AmE adjective
1 . careful, thorough, and exact:
a rigorous analysis of defence needs
the rigorous standards required by the college
2 . very severe or strict:
rigorous army training
—rigorously adverb
rig ‧ or ‧ ous /ˈrɪɡərəs/ BrE AmE adjective
1 . careful, thorough, and exact:
a rigorous analysis of defence needs
the rigorous standards required by the college
2 . very severe or strict:
rigorous army training
—rigorously adverb
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012