RIGOROUS
rigorous
Adjective
- Manifesting, exercising, or favoring rigour; 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.
- Severe; intense; inclement; as, a rigorous winter.
- Violent.
The above text is a snippet from Wiktionary: rigorous
and as such is available under the Creative Commons Attribution/Share-Alike License.