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Variable and Hard

variable

noun

  • Something that is likely to vary; something that is subject to variation.
    • usage: "the weather is one variable to be considered"
  • A quantity that can assume any of a set of values.
  • A star that varies noticeably in brightness.
  • A symbol (like x or y) that is used in mathematical or logical expressions to represent a variable quantity.

adjective

  • Liable to or capable of change.
    • usage: "rainfall in the tropics is notoriously variable"; "variable winds"; "variable expenses"
  • Marked by diversity or difference.
    • usage: "the varying angles of roof slope"; "nature is infinitely variable"
  • Used of a device) designed so that a property (as e. G. Light) can be varied. (
    • usage: "a variable capacitor"; "variable filters in front of the mercury xenon lights"
WordNet 3.0 © 2006 by Princeton University
Webster's Revised Unabridged Dictionary

Variable is an element in a model. For example, in the model RS&Pt+1 = a + b Tbill t + et, where RS&Pt+1 is the return on the S&P in month t+1 and Tbill is the Tbill return at month t, both RS&P and Tbill are "variables" because they change through time; i. E., they are not constant.

hard
Webster's Revised Unabridged Dictionary

adjective

  • Not easy; requiring great physical or mental effort to accomplish or comprehend or endure.
    • usage: "a difficult task"; "nesting places on the cliffs are difficult of access"; "difficult times"; "why is it so hard for you to keep a secret"
  • Dispassionate.
    • usage: "took a hard look"; "a hard bargainer";
  • Resisting weight or pressure.
  • Very strong or vigorous.
    • usage: "strong winds"; "a hard left to the chin"; "a knockout punch"; "a severe blow"
  • Characterized by effort to the point of exhaustion; especially physical effort.
    • usage: "worked their arduous way up the mining valley"; "a grueling campaign"; "hard labor"; "heavy work"; "heavy going"; "spent many laborious hours on the project"; "set a punishing pace"
  • Produced without vibration of the vocal cords.
    • usage: "unvoiced consonants such as `p' and `k' and `s'"
  • Of light. ( transmitted directly from a pointed light source)
  • Of speech sounds. (; produced with the back of the tongue raised toward or touching the velum)
    • usage: "Russian distinguished between hard consonants and palatalized or soft consonants"
  • Given to excessive indulgence of bodily appetites especially for intoxicating liquors.
    • usage: "a hard drinker"
  • Being distilled rather than fermented; having a high alcoholic content.
    • usage: "hard liquor"
  • Unfortunate or hard to bear.
    • usage: "had hard luck"; "a tough break"
  • Dried out.
    • usage: "hard dry rolls left over from the day before"

adverb

  • With effort or force or vigor.
    • usage: "the team played hard"; "worked hard all day"; "pressed hard on the lever"; "hit the ball hard"; "slammed the door hard"
  • With firmness.
    • usage: "held hard to the railing"
  • Earnestly or intently.
    • usage: "thought hard about it"; "stared hard at the accused"
  • Causing great damage or hardship.
    • usage: "industries hit hard by the depression"; "she was severely affected by the bank's failure"
  • Slowly and with difficulty.
    • usage: "prejudices die hard"
  • Indulging excessively.
    • usage: "he drank heavily"
  • Into a solid condition.
    • usage: "concrete that sets hard within a few hours"
  • Very near or close in space or time.
    • usage: "it stands hard by the railroad tracks"; "they were hard on his heels"; "a strike followed hard upon the plant's opening"
  • With pain or distress or bitterness.
    • usage: "he took the rejection very hard"
  • To the full extent possible; all the way.
    • usage: "hard alee"; "the ship went hard astern"; "swung the wheel hard left"
WordNet 3.0 © 2006 by Princeton University
Variable and Hard in Power Thesaurus