Declineとは意味・読み方・使い方

出典:『Wiktionary』 (2026/01/02 22:53 UTC 版)

語源

From 中期英語 declinen, and ultimately Latin declīnō (“to bend, turn aside, deflect, inflect, decline”, from de (“down”) +‎ clīnō (“to bend, to incline”)), from Proto-Indo-European *ḱley- (English lean). The senses arrived from two separate pathways in 中期英語:

The grammatical sense came from 古期英語 declīnian, which was borrowed directly from the Latin etymon.
All senses except the grammatical sense were derived from those of Old French decliner. Old French itself borrowed the verb from Latin.

発音

enPR: dĭ-klīnʹ, IPA: /dɪˈklaɪn/
ハイフネーション: de‧cline
韻: -aɪn

名詞

decline (countable and uncountable, plural declines)

Downward movement, fall.(Can we add an example for this sense?)
A sloping downward, e.g. of a hill or road.

After taking a right from that turn a decline will come into view.
A deterioration of condition; a weakening or worsening.

He has experienced a sudden decline in his health.

Educational standards are on the decline.

The country 's global reputation is in decline.
- 2012 January, Philip E. Mirowski, “Harms to Health from the Pursuit of Profits”, in American Scientist‎, volume 100, number 1, archived from the original on 4 April 2012, page 87:
  
  In an era when political leaders promise deliverance from decline through America’s purported preeminence in scientific research, the news that science is in deep trouble in the United States has been as unwelcome as a diagnosis of leukemia following the loss of health insurance.
A reduction or diminution of activity, prevalence or quantity.

Population decline is a major concern.

Town-centre retailers have seen a decline in footfall.
- 1992, Rudolf M[athias] Schuster, The Hepaticae and Anthocerotae of North America: East of the Hundredth Meridian, volume V, Chicago, Ill.: Field Museum of Natural History, →ISBN, page ix:
  
  It is also pertinent to note that the current obvious decline in work on holarctic hepatics most surely reflects a current obsession with cataloging and with nomenclature of the organisms—as divorced from their study as living entities.
- 2022 March 23, Paul Clifton, “Londoners pay the price”, in RAIL, number 953, page 48:
  
  "It knows it has to plan for managed decline, but it can't even plan for managed decline if it doesn't know how much decline to manage."
The act of declining or refusing something.
- 2004, David A. Montague, Fraud Prevention Techniques for Credit Card Fraud:
  
  The issuing bank only checks the consumer 's credit card number for authorization. […] Soft declines are those declines in which the bank requires further verification.

反意語

incline

派生語

acute oak decline
declinal
declinarian
declinism
declinist
declinometer
oak decline
olive quick decline syndrome

動詞

decline (third-person singular simple present declines, present participle declining, simple past and past participle declined)

(intransitive) To move downwards, to fall, to drop.

The dollar has declined rapidly since 2001.
(intransitive) To become weaker or worse.

My health declined in winter.
- 1982 February 13, Nancy Walker, “Connie”, in Gay Community News, volume 9, number 29, page 10:
  
  After her sother died, Connie began to decline noticeably.
(transitive) To bend downward; to bring down; to depress; to cause to bend, or fall.
- a. 1749 (date written), James Thomson, “Spring”, in The Seasons, London: […] A[ndrew] Millar, and sold by Thomas Cadell, […], published 1768, →OCLC:
  
  in melancholy site, with head declined
- 1590, Edmund Spenser, “Book II, Canto IX”, in The Faerie Queene. […], London: […] [John Wolfe] for William Ponsonbie, →OCLC, stanza 10:
  
  And now faire Phoebus gan decline in hast / His weary wagon to the Westerne vale.
(transitive) To cause to decrease or diminish.
- 1612–1613, Nathan Field, John Fletcher, Philip Massinger, “The Honest Mans Fortune”, in Comedies and Tragedies […], London: […] Humphrey Robinson, […], and for Humphrey Moseley […], published 1647, →OCLC, Act II, scene ii:
  
  You have declin'd his means.
- 1624, Democritus Junior [pseudonym; Robert Burton], The Anatomy of Melancholy: […], 2nd edition, Oxford, Oxfordshire: […] John Lichfield and James Short, for Henry Cripps, →OCLC:
  
  He knoweth his error, but will not seek to decline it.
To turn or bend aside; to deviate; to stray; to withdraw.

a line that declines from straightness

conduct that declines from sound morals
- 1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], →OCLC, Psalms 99:157:
  
  Yet do I not decline from thy testimonies.
(transitive) To choose not to do something; refuse, forbear, refrain.
- 1626, Philip Massinger, The Roman Actor:
  
  Could I decline this dreadful hour?
- 1918, W[illiam] B[abington] Maxwell, chapter VII, in The Mirror and the Lamp, Indianapolis, Ind.: The Bobbs-Merrill Company, →OCLC:
  
  “ […] This is Mr. Churchill, who, as you are aware, is good enough to come to us for his diaconate, and, as we hope, for much longer; and being a gentleman of independent means, he declines to take any payment.” Saying this Walden rubbed his hands together and smiled contentedly.
On reflection I think I will decline your generous offer.
(transitive, grammar, usually of substantives, adjectives and pronouns) To inflect for case, number, gender, and the like.

Synonym: declense (rare)

Hyponym: misdecline
(transitive, grammar) To recite all the different declined forms of (a word): to recite its declension.

Synonym: declense (rare)

Hyponym: misdecline
- 1570, Roger Ascham, The Scholemaster, 1st edition:
  
  after the first declining of a noun and a verb
(by extension) To run through from first to last; to recite in order as though declining a noun.
- c. 1593 (date written), William Shakespeare, “The Tragedy of Richard the Third: […]”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act IV, scene iv]:
  
  Decline all this, and see what now thou art. For happy wife, a most distressed widow;
  For joyful mother, one that wails the name;
  For one being sued to, one that humbly sues;
  For queen , a very caitiff crown'd with care […]
(American football, Canadian football) To reject a penalty against the opposing team, usually because the result of accepting it would benefit the non-penalized team less than the preceding play.

The team chose to decline the fifteen-yard penalty because their receiver had caught the ball for a thirty-yard gain.

使用する際の注意点

Decline, refuse, forbear, refrain: Decline is gentler than refuse and carries a connotation that the non-acceptance is an acceptable or anticipated option (decline an invitation) or the result of a considered decision (the judge declined to grant the motion). Refuse has a stronger connotation of rejection, firmness, resistance, or non-compliance. For example, if someone declines to give their name, that suggests they were given a choice and elected not to give their name. If someone refuses to give their name, the connotation is more toward a suggestion that they normally should have given their name and are being intransigent. Forbear or refrain, conversely, suggest choosing not to do something that one might indulge in or be tempted to do (refrain from smoking), with forbear having an added connotation of showing some fortitude in withstanding the temptation (forbear to show anger). Refrain can also be used to refer to a general policy or preference rather than a choice on a single occasion.
The noun form for most meanings of decline is decline, e.g. "the decline of the empire". The noun for decline in the grammatical senses is declension. The noun declination has to do with astronomical coordinates, and is rare or archaic as the noun form of the verb decline.

Conjugation

Conjugation of *decline*
	present tense	past tense
infinitive	(to) decline

1st-person singular	decline	declined
2nd-person singular	decline, declinest	declined, declinedst
3rd-person singular	declines, declineth	declined
plural	decline	declined

subjunctive	decline	declined

imperative	decline	—

participles	declining	declined

Archaic or obsolete.

派生語

declension
declinability
declinable
declination
decliningly
redecline
Texas phoenix palm decline
undeclined
undeclining

アナグラム

Delnice

中期英語

語源 1

名詞

decline

alternative form of declin

語源 2

動詞

decline

alternative form of declinen

印欧語根
de-	指示語幹、前置詞、副詞の語幹を表す印欧語根。重要な派生語は、接頭辞 de-（decide, defect, derivative, detailなど）の単語、to, today, tooなど。
klei-	反り返ること、もたれたり頼ることを表す（incline, climax, client, clinicなど）。


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Declineとは 意味・読み方・使い方

Declineの品詞ごとの意味や使い方

Declineの変形一覧

Declineのイディオムやフレーズ

Declineの学習レベル

「Decline」を含む例文一覧

decline

decline

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「decline」とは・「decline」の意味

declineの用法

動詞

名詞

decline

Decline

decline

decline

decline

decline

decline

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decline

Decline

decline

DECLINE

decline

decline

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decline

decline

decline

語源

発音

名詞

反意語

派生語

動詞

使用する際の注意点

Conjugation

派生語

関連する語

Further reading

アナグラム

語源 1

名詞

語源 2

動詞

decline

「Decline」を含む例文一覧

Declineとは意味・読み方・使い方

Declineの
品詞ごとの意味や使い方

Declineの
変形一覧

Declineの
イディオムやフレーズ