Not of obvious or immediate cause, but as a secondary result
Not focused straight at the target or subject, but by more subtle means
Not involving the quickest, shortest, or most convenient path
An indirect cost.
An indirect radiator
To access by means of indirection; to dereference.
Ultrasonic, having a frequency too high to be audible.
Greater than the speed of sound (in the same medium, and at the same temperature and pressure).
An aircraft that can travel at the speed of sound.