hypersonic
/ˌhaɪpəˈsɒnɪk/adjective
1
- relating to speeds of more than five times the speed of sound (Mach 5)特超音速的, 超出5倍音速（5马赫）的。
2
- relating to sound frequencies above about a thousand million hertz.特超声频的, 声频超过10亿赫兹的。
派生词
hypersonically
adverb词源
1930s (in sense 2)： from HYPER- 'beyond, exceeding', on the pattern of supersonic and ultrasonic.