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   hypersonic

   /hʌɪpəˈsɒnɪk/

   adjective

   • 1. relating to speeds of more than five times the speed of sound (Mach 5).
   • 2. relating to sound frequencies above about a thousand million hertz.

   Word Origin 1930s (in hypersonic (sense 2)): from hyper- ‘beyond, exceeding’, on the pattern of supersonic and ultrasonic.

   Derivatives

   • 1. hypersonically adverb

   Scrabble Points: 20

   • H

     4

   • Y

     4

   • P

     3

   • E

     1

   • R

     1

   • S

     1

   • O

     1

   • N

     1

   • I

     1

   • C

     3

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