1. a real number that cannot be expressed as a rational number

    Synonyms : irrational number
    Type Of : real, real number
  2. not consistent with or using reason

    Antonyms : rational
    Examples :
    • irrational fears
    • irrational animals
  3. real but not expressible as the quotient of two integers

    Antonyms : rational
    Examples :
    • irrational numbers


  1. characterized by often poignant difference or incongruity between what is expected and what actually is

    Synonyms : ironical
    Examples :
    • madness, an ironic fate for such a clear thinker
    • it was ironical that the well-planned scheme failed so completely
  2. humorously sarcastic or mocking

    Synonyms : dry, ironical, wry
    Examples :
    • an ironic remark often conveys an intended meaning obliquely
    • an ironic novel
    • an ironical smile


  1. so lacking in interest as to cause mental weariness

    Synonyms : boring, deadening, dull, ho-hum, slow, tedious, tiresome, wearisome
    Examples :
    • what an irksome task the writing of long letters is


  1. characterized by anger

    Synonyms : choleric
    Examples :
    • an irascible response
  2. quickly aroused to anger

    Synonyms : choleric, hot-tempered, hotheaded, quick-tempered, short-tempered


  1. immune to attack; incapable of being tampered with

    Synonyms : impregnable, secure, strong, unassailable, unattackable
    Examples :
    • fortifications that made the frontier inviolable
  2. must be kept sacred

    Synonyms : inviolate, sacrosanct
  3. not capable of being violated or infringed

    Synonyms : absolute, infrangible
  4. incapable of being transgressed or dishonored

    Antonyms : violable
    Examples :
    • the person of the king is inviolable
    • an inviolable oath


  1. containing or implying a slight or showing prejudice

    Synonyms : discriminatory
    Examples :
    • invidious comparisons


  1. in a habitual and longstanding manner

    Synonyms : chronically
  2. habitual

    Synonyms : chronic


  1. invulnerable to fear or intimidation

    Synonyms : audacious, brave, dauntless, fearless, hardy, unfearing
    Examples :
    • intrepid pioneers


  1. the trait of being intransigent; stubbornly refusing to compromise

    Synonyms : intransigency
    Type Of : bullheadedness, obstinacy, obstinance, pigheadedness, self-will, stubbornness


  1. stopping and starting at irregular intervals

    Examples :
    • intermittent rain showers