IPA: /haɪˈpɜːrsənɪkli/
KK: /haɪˈpɜrsənɪkli/
In a manner that relates to or involves speeds that are significantly greater than the speed of sound, typically defined as speeds greater than five times the speed of sound.
The spacecraft traveled hypersonically, allowing it to reach its destination much faster than conventional aircraft.
Hypersonically → It is formed from "hyper-" (meaning over or beyond) and "sonic" (from Latin "sonicus", meaning of sound). The suffix "-ly" indicates a manner. The word "hypersonically" refers to a manner that exceeds the speed of sound.
Think of 'hyper-' meaning 'beyond' and 'sonic' relating to 'sound' — so hypersonically means moving in a way that goes beyond the speed of sound.