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rigorous

1 ENTRIES FOUND:
rigorous /ˈrɪgərəs/ adjective
rigorous
/ˈrɪgərəs/
adjective
Britannica Dictionary definition of RIGOROUS
[more rigorous; most rigorous]
: very strict and demanding
: done carefully and with a lot of attention to detail
: difficult to endure because of extreme conditions

— rigorously

adverb

— rigorousness

noun [noncount]