Using sound waves (5)
I believe the answer is:
sonic
(Other definitions for sonic that I've seen before include "Like mine, possibly" , "Using waves" , "seven hundred and forty three mph!" , "Producing sound" , "Relating to the speed of sound" .)
I believe the answer is:
sonic
(Other definitions for sonic that I've seen before include "Like mine, possibly" , "Using waves" , "seven hundred and forty three mph!" , "Producing sound" , "Relating to the speed of sound" .)