rigorous sentence

Our rigorous testing procedure guarantees that you will get the best quality goods available.
found the rigours of touring to be much too demanding.

Antonyms

• clement,
• forbearing,
• gentle,
• indulgent,
• lax,
• lenient,
• tolerant

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Translate rigorous into Spanish
1 Extremely thorough and careful.

[From A Modern History, From the Time of Luther to the Fall of Napoleon For the Use of Schools and Colleges by Lord, John]
The palace rigorously guarded.

To show how it all plays out, Rosin spent many months reporting—and, indeed, The End of Men is rigorously researched.
All Of These Words Are Offensive (But Only Sometimes)

References:

http://www.merriam-webster.com/dictionary/rigorous
http://en.oxforddictionaries.com/definition/Rigorous
http://www.vocbit.com/example/rigorous
http://www.dictionary.com/browse/rigorously
http://www.easybib.com/guides/how-to-write-a-strong-thesis-statement/