retrograde

Estimated CEFR level: C2 — Proficiency

Estimated from word frequency; not an official CEFR classification.

Definition

  1. verb move backward in an orbit, of celestial bodies
  2. verb move in a direction contrary to the usual one
  3. verb move back

Etymology

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”), 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”). By surface analysis, retro- + -grade. The adverb and noun are derived from the adjective.

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