underspin

/ˈʌndərˌspɪn/
noun
  1. A backward spin on a ball (such as in tennis or table tennis) that makes it drop or bounce low.
    • The player's underspin caused the ball to skid off the court.
    • Learning to add underspin to your shots can make them harder to return.
    • She used underspin on her serve to keep the ball low.
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