Rigorous
Rigorous , adjective
[French rigoureux, Late Latin rigorosus. See Rigor.]
1.
Manifesting, exercising, or favoring rigor; allowing no abatement or mitigation; scrupulously accurate; exact; strict; severe; relentless; as, a rigorous officer of justice; a rigorous execution of law; a rigorous definition or demonstration.
He shall be thrown down the Tarpeian Rock
With rigorous hands.
We do not connect the scattered phenomena into their rigorous unity.
2.
Severe; intense; inclement; as, a rigorous winter.
3.
Violent. [Obsolete]
Rigorous uproar.
4.
(Mathematics, Logic) Adhering scrupulously and exactly to accepted principles; hence, logically valid; as, a rigorous proof.