Rigorous

Part of speech: adjective (a.)

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. Shak. We do not connect the scattered phenomena into their rigorous unity. De Quincey.

2. Severe; intense; inclement; as, a rigorous winter.

3. Violent. [Obs.] "Rigorous uproar." Spenser.

Synonyms: Rigid; inflexible; unyielding; stiff; severe; austere; stern; harsh; strict; exact. Rig"or*ous*ly, adv. Rig"or*ous*ness, n.