rigorous

Part of speech: adverb

Rigorously.

Part of speech: noun

Rigorousness.

Part of speech: adjective

Strict; severe; exact.

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Usage examples "rigorous":

  1. But seldom does any man make this sacrifice; in this land of rigorous hardship and starvation it means much. - "The Eternal Maiden", T. Everett Harré.
  2. Owing to his prodigious genius, the musical drama has entered into a new era, an era of true reason, of rigorous good sense and of perfect logic. - "Masters of French Music", Arthur Hervey.
  3. Eratosthenes soon disappeared from the horizon without the projectile having been sufficiently near it to allow a rigorous observation. - "The Moon-Voyage", Jules Verne.