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单词 retardation
释义

WordReference Random House Unabridged Dictionary of American English © 2024
re•tar•da•tion  (rē′tär dāshən),USA pronunciation n. 
  1. the act of retarding or state of being retarded.
  2. something that retards; hindrance.
  3. slowness or limitation in intellectual understanding and awareness, emotional development, academic progress, etc.
  4. Music and Dancea form of suspension that is resolved upward.
Also, re•tard•ment (ri tärdmənt).USA pronunciation 
  • Latin retardātiōn- (stem of retardātiō), equivalent. to retardāt(us) (see retard, -ate1) + -iōn- -ion
  • late Middle English retardacioun 1400–50
re•tard•a•tive  (ri tärdə tiv),USA pronunciation re•tard•a•to•ry  (ri tärdə tôr′ē, -tōr′ē),USA pronunciation adj. 
Collins Concise English Dictionary © HarperCollins Publishers::
retardation /ˌriːtɑːˈdeɪʃən/, (less commonly)retardment /rɪˈtɑːdmənt/ n
  1. the act of retarding or the state of being retarded
  2. something that retards; hindrance

reˈtardative, reˈtardatory adj
WordReference Random House Learner's Dictionary of American English © 2024
re•tard /rɪˈtɑrd for 1.; ˈritɑrd for 4 in Unabridged dictionary. USA pronunciation   v. [+ object]
  1. to delay the development or progress of:Cold retards the growth of bacteria.

n. [countable]
  1. Slang Terms(disparaging).
    • a mentally retarded person.
    • one who is stupid or ineffective.
re•tar•da•tion /ˌritɑrˈdeɪʃən/USA pronunciation  n. [uncountable]

WordReference Random House Unabridged Dictionary of American English © 2024
re•tard  (ri tärd, for 1–3, 5;tärd for 4),USA pronunciation v.t. 
  1. to make slow;
    delay the development or progress of (an action, process, etc.);
    hinder or impede.

v.i. 
  1. to be delayed.

n. 
  1. a slowing down, diminution, or hindrance, as in a machine.
  2. Slang Terms(disparaging).
    • a mentally retarded person.
    • a person who is stupid, obtuse, or ineffective in some way:a hopeless social retard.
  3. Automotivean adjustment made in the setting of the distributor of an internal-combustion engine so that the spark for ignition in each cylinder is generated later in the cycle. Cf. advance. 
  • Latin retardāre to delay, protract, equivalent. to re- re- + tardāre to loiter, be slow, derivative of tardus slow; see tardy
  • 1480–90
re•tarding•ly, adv. 
    • 1.See corresponding entry in Unabridged obstruct, check.
    • 1.See corresponding entry in Unabridged accelerate.

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