re·coil /rɪˈkɔɪ(ə)l/
  畏縮,後退,彈回,反作用,后座力(vi.)退卻,畏縮,彈回,撤退,反衝,報應
  Re·coil v. i. [imp. & p. p. Recoiled p. pr. & vb. n. Recoiling.]
  1. To start, roll, bound, spring, or fall back; to take a reverse motion; to be driven or forced backward; to return.
     Evil on itself shall back recoil.   --Milton.
     The solemnity of her demeanor made it impossible . . . that we should recoil into our ordinary spirits.   --De Quincey.
  2. To draw back, as from anything repugnant, distressing, alarming, or the like; to shrink.
  3. To turn or go back; to withdraw one's self; to retire. [Obs.] “To your bowers recoil.”
  Re·coil v. t. To draw or go back. [Obs.]
  Re·coil, n.
  1. A starting or falling back; a rebound; a shrinking; as, the recoil of nature, or of the blood.
  2. The state or condition of having recoiled.
     The recoil from formalism is skepticism.   --F. W. Robertson.
  3. Specifically, the reaction or rebounding of a firearm when discharged.
  Recoil dynamometer Gunnery, an instrument for measuring the force of the recoil of a firearm.
  Recoil escapement. See the Note under Escapement.
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  recoil
       n 1: the backward jerk of a gun when it is fired [syn: kick]
       2: a movement back from an impact [syn: repercussion, rebound,
           backlash]
       v 1: draw back, as with fear or pain; "she flinched when they
            showed the slaughtering of the calf" [syn: flinch, squinch,
             funk, cringe, shrink, wince, quail]
       2: spring back; spring away from an impact; "The rubber ball
          bounced"; "These particles do not resile but they unite
          after they collide" [syn: bounce, resile, take a hop,
           spring, bound, rebound, reverberate, ricochet]
       3: spring back, as from a forceful thrust; "The gun kicked back
          into my shoulder" [syn: kick back, kick]