RETROGRADEとは 意味・読み方・使い方

発音

• (Received 発音) IPA^(key): /ˈɹɛtɹə(ʊ)ɡɹeɪd/
• (General American) IPA^(key): /ˈɹɛtɹəˌɡɹeɪd/
• ハイフネーション: re‧tro‧grade

語源 1

The adjective is derived from Middle English retrograd, retrograde (“of a planet: appearing to move in a direction opposite to the order of the zodiac signs, retrograde; unfortunate”),^[1] from Middle French retrograde and Old French retrograde (“of a celestial object: appearing to move backwards; moving backwards; reverse; palindromic; opposed to change”) (modern French rétrograde), and from their etymon Latin retrōgradus (“of a celestial object: appearing to move backwards”) (compare Late Latin retrōgradus (“reverse; palindromic”)), from retrō (“back, backwards; behind; before, formerly”) + gradus (“pace, step”).^[2] Retrō is derived from re- (prefix meaning ‘back, backwards’) + *-trō (probably from intrō (“to enter, go into”)); gradus is ultimately from Proto-Indo-European *gʰredʰ- (“to go; to walk”).

The adverb and noun are derived from the adjective.

形容詞

retrograde (comparative more retrograde, superlative most retrograde)

1. Directed or moving backwards in relation to the normal or previous direction of travel; retreating.
2. Reverting to an inferior or less developed state; declining, regressing.
   1. (zoology) Of an animal: appearing to regress to a less developed form during its lifetime.
3. Of the order of something: inverse, reverse.
   1. (music) Having a passage of music played backwards.
4. Of ideas or a person: opposing social reform, favouring the maintenance of the status quo; conservative.

   Synonyms: reactionary, traditionalist

   Antonyms: liberal, progressist, reformist

   retrograde ideas, morals, etc.

   • 1976 September, Saul Bellow, Humboldt’s Gift, New York, N.Y.: Avon Books, →ISBN, page 74:

     Such retrograde people still exist, resisting modernity, dragging their feet.

5. (archaic)
   1. Involving a return to or a retracing of a previous course of travel.
   2. Counterproductive to a desired outcome; contradictory, contrary.
      • c. 1599–1602 (date written), William Shakespeare, “The Tragedie of Hamlet, Prince of Denmarke”, in Mr. William Shakespeares Comedies, Histories, & Tragedies […] (First Folio), London: […] Isaac Iaggard, and Ed[ward] Blount, published 1623, →OCLC, [Act I, scene ii]:

        In going back to school in Wittenberg, / It is most retrograde to our desire: / And we beseech you, bend you to remain

6. (astronomy)
   1. Of a celestial body orbiting another: in the opposite direction to the orbited body's spin.

      Antonyms: direct, prograde

   2. (also astrology, often postpositive) Of a celestial body: seeming to move across the sky in the opposite direction from its ordinary movement.

      Mercury retrograde

      • 2018 March 22, Wilder Davies, “Mercury Is Entering Retrograde Again. This Is Why So Many People Care”, in Time‎^[1]:

        The inauspicious connotations of Mercury retrograde are actually quite old, evidenced in an ancient branch of astrology known as horary astrology.

7. (geology) Of a metamorphic change: resulting from a decrease in pressure or temperature.

   Antonym: prograde

8. (medicine) Of amnesia: relating to the period leading up to the episode which caused it.
9. (poetry, archaic) Of verse: reading the same forwards or backwards; palindromic.

反意語

• anterograde
• prograde

派生語

関連する語

• posigrade
• retrogradation

副詞

retrograde (comparative more retrograde, superlative most retrograde)

1. In a reverse direction; backwards.

   Synonym: retrogradely

名詞

retrograde (複数形 retrogrades)

1. A movement backwards or opposite to the intended or normal motion.
   1. (astrology) The apparent movement of a planet across the sky in the opposite direction from its ordinary movement.
2. One who opposes social reform, favouring the maintenance of the status quo; a conservative.

   Synonyms: (both 主に米国用法, くだけた用法) mossback, mossyback, reactionary, traditionalist

3. (archaic) One who reneges on an agreement, or switches loyalties; a rebel, a renegade.
4. (music) The reversal of a melody so that what is played first in the original melody is played last, and what is played last in the original melody is played first.

語源 2

From Middle French retrograder (“to (cause to) go back, return; to (cause to) move backwards; of a celestial object: to show retrograde motion; to date to an earlier period”) (modern French rétrograder), and from its etymon Latin retrōgradī, the present active infinitive of retrōgradior (“to go または step back または backwards; of a celestial object: to show retrograde motion”) (compare Late Latin retrogradare, retrogradari, retrogredere), from retrō (“back, backwards; behind; before, formerly”) + gradior (“to step, walk; to advance, go”) (ultimately from Proto-Indo-European *gʰredʰ- (“to go; to walk”)).^[3]

動詞

retrograde (三人称単数 現在形 retrogrades, 現在分詞 retrograding, 過去形および過去分詞形 retrograded)

1. (transitive)
   1. (geography) To cause (a land feature such as a coastline または waterfall) to undergo retrogradation, that is, to travel in the direction of the land or upstream due to erosion.
   2. (geology) To change (minerals, rocks, etc.) metamorphically through a decrease in pressure or temperature.
   3. (obsolete) To cause (someone または something) to revert to an inferior or less developed state.
2. (intransitive)
   1. To revert to an inferior or less developed state; to decline, to regress.
      • 1862 July – 1863 August, George Eliot [pseudonym; Mary Ann Evans], Romola. […], volume III, London: Smith, Elder and Co., […], published 1863, →OCLC, book III, page 260:

        […] Monna Brigida, who had retrograded to false hair in Romola's absence, but now drew it off again and declared she would not mind being gray, if her dear child would stay with her.

   2. (astrology, astronomy) Of a celestial body, especially a planet: to show retrogradation; to seem to move across the sky in the opposite direction from its ordinary movement.
   3. (geography) Of a land feature: to travel in the direction of the land or upstream due to erosion.
   4. (military) To retreat or withdraw from a position.
   5. (obsolete)
      1. To move backwards; to recede.
         • 1845, Joseph C. Neal, “The Moral of Goslyne Greene, who was Born to a Fortune”, in The Gift: A Christmas, New Year, and Birthday Present, Philadelphia, Pa.: Carey and Hart, →OCLC, page 68:

           A dabble in the stocks does not always turn out profitably; cotton is sometimes heavy on our hands, and real estate will sulkily retrograde, when, by the calculation, it ought to have advanced.

      2. Of the telling of an incident, etc.: to move to an earlier time.

派生語

• retrograded (adjective)

関連する語

• retrogress
• retrogression
• retrogressive

参照

Further reading

• apparent retrograde motion on Wikipedia.
• retrograde and prograde motion on Wikipedia.
• retrograde (disambiguation) on Wikipedia.

アナグラム

• retrogarde