effectとは

発音

• (Received 発音) IPA^(key): /ɪˈfɛkt/
• (General American) IPA^(key): /əˈfɛkt/
• 韻: -ɛkt
• ハイフネーション: ef‧fect

名詞

effect (countable かつ uncountable, 複数形 effects)

1. The result or outcome of a cause. See usage notes below.
   • 1898, Winston Churchill, chapter 1, in The Celebrity:

     The stories did not seem to me to touch life. They were plainly intended to have a bracing moral effect, and perhaps had this result for the people at whom they were aimed.

   • 1963, Margery Allingham, chapter 1, in The China Governess‎^[1]:

     The half-dozen pieces […] were painted white and carved with festoons of flowers, birds and cupids. […]  The bed was the most extravagant piece.  Its graceful cane halftester rose high towards the cornice and was so festooned in carved white wood that the effect was positively insecure, as if the great couch were trimmed with icing sugar.

   • 2013 June 8, “Obama goes troll-hunting”, in The Economist, volume 407, number 8839, page 55:

     The solitary, lumbering trolls of Scandinavian mythology would sometimes be turned to stone by exposure to sunlight. Barack Obama is hoping that several measures announced on June 4th will have a similarly paralysing effect on their modern incarnation, the patent troll.

   The effect of the hurricane was a devastated landscape.

2. Impression left on the mind; sensation produced.
   • J. C. Shairp

     patchwork […] introduced for oratorical effect

   • Washington Irving

     The effect was heightened by the wild and lonely nature of the place.

3. Execution; performance; realization; operation.
   • Shakespeare

     That no compunctious visitings of nature / Shake my fell purpose, nor keep peace between / The effect and it.

   1. (uncountable) The state of being binding and enforceable, as in a rule, policy, or law.

      The new law will come into effect on the first day of next year.

4. (cinematography) An illusion produced by technical means (as in "special effect")

   The effect of flying was most convincing.

5. (sound engineering) An alteration, or device for producing an alteration, in sound after it has been produced by an instrument.

   I use an echo effect here to make the sound more mysterious.

   I just bought a couple of great effects.

6. (physics, psychology, etc.) A scientific phenomenon, usually named after its discoverer.

   Doppler effect

7. (usually in the plural) Belongings, usually as personal effects.
8. Consequence intended; purpose; meaning; general intent; with to.
   • Bible, Chron. xxxiv. 22

     They spake to her to that effect.

9. (obsolete) Reality; actual meaning; fact, as distinguished from mere appearance.
   • Denham

     no other in effect than what it seems

10. (obsolete) Manifestation; expression; sign.
    • Shakespeare

      All the large effects / That troop with majesty.

使用する際の注意点

The words “affect” and “effect” can both be used as nouns or verbs, but when used as a noun the word affect is more common in the psychology field, and the above definitions for effect are much more common. See also the usage notes as a verb below.

Adjectives often applied to "effect":

• biological, chemical, cultural, economic, legal, mental, moral, nutritional, personal, physical, physiological, political and social
• actual, bad, beneficial, catastrophic, deleterious, disastrous, devastating, fatal, good, harmful, important, intended, likely, natural, negative, positive, potential, primary, real, secondary, significant, special, strong, undesirable and weak

下位語

派生語

• after-effect

関連する語

• in effect
• personal effects

動詞

effect (三人称単数 現在形 effects, 現在分詞 effecting, 過去形および過去分詞形 effected)

1. To make or bring about; to implement.

   The best way to effect change is to work with existing stakeholders.

2. Misspelling of affect.

使用する際の注意点

Effect is often confused with “affect”. The latter is used to convey the influence over existing ideas, emotions and entities; the former indicates the manifestation of new or original ideas or entities:

• “...new governing coalitions have effected major changes” indicates that major changes were made as a result of new governing coalitions.
• “...new governing coalitions have affected major changes” indicates that before new governing coalitions, major changes were in place, and that the new governing coalitions had some influence over these existing changes.

関連する語

Further reading

• effect in Webster’s Revised Unabridged Dictionary, G. & C. Merriam, 1913
• effect in The Century Dictionary, The Century Co., New York, 1911