英和和英

語源

From 中期英語 quadruple, from Latin quadruplus. Can be analyzed as quadri- +‎ -ple.

発音

• (Received Pronunciation) IPA: /ˈkwɒd.ɹʊ.pəl/, /kwɒˈdɹuː.pəl/
• (General American) IPA: /kwɑˈdɹu.pəl/, /kwɑˈdɹʌp.əl/, /ˈkwɑd.ɹə.pəl/
• 韻: -uːpəl

形容詞

quadruple (not comparable)

1. Being four times as long, as big or as many of something.

   He's quite an athlete and can do quadruple jumps with ease.

反意語

• quarter (divided into four; one of four equal parts)

派生語

動詞

quadruple (third-person singular simple present quadruples, present participle quadrupling, simple past and past participle quadrupled)

1. (transitive) To multiply by four.

   Quadrupling four gives sixteen.

2. (intransitive) To increase by a factor of four.

   Our profits quadrupled when we made the improvements.

   • 2025 June 25, Chris Vallance, “'Fast tech' warning as demand for cheap gadgets heats up”, in BBC‎, archived from the original on 26 June 2025:

     Overall, consumer spending on fast tech has quadrupled to £11.6bn since 2023, surveys carried out for Material Focus suggested.

3. (rail transport) To provide four parallel running lines on a given stretch of railway.
   • 1950 September, “Network News: Watford Tunnel, L.M.R.”, in Railway Magazine, page 641:

     On June 8, 1872, the London & North Western Railway obtained powers to quadruple its main line, and a new tunnel was bored for the up and down slow lines.

   • 2019 October, “Railtalk: HS2 delay - time for lateral thinking”, in Modern Railways, page 7:

     Quadrupling the short remaining stretch of three-track railway north of Rugby, left over by the turn of the century modernisation, is a possibility that could be pursued.

   • 2020 April 22, Paul Shannon, “Felixstowe: Is 47 trains a day achievable?”, in Rail, page 52:

     A long-term aspiration is to quadruple the cross-country route between Peterborough and Werrington Junction, removing any conflict between trains on the Spalding and Leicester lines.

反意語

• quarter (divide by four)

派生語

• quadruplet

名詞

quadruple (plural quadruples)

1. Something that is four times the usual number, amount, size, etc.
2. (skating) A figure-skating jump with four revolutions in the air.

   Synonym: quad

派生語

参考

Further reading

• “quadruple”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
• William Dwight Whitney, Benjamin E[li] Smith, editors (1911), “quadruple”, in The Century Dictionary […], New York, N.Y.: The Century Co., →OCLC.

アナグラム

• quadrupel