stealthnoun [ U ]
uk/stelθ/us/stelθ/movement that is quiet and careful in order not to be seen or heard, or secret action:
These thieves operate with terrifying stealth - they can easily steal from the pockets of unsuspecting travellers.
It would seem that some politicians would prefer to use financial stealth rather than legislation to produce change.
The weapons had been acquired by stealth.
stealthy
adjective uk/ˈstel.θi/us/ˈstel.θi/
stealthy footsteps
stealthily
adverb uk/ˈstel.θəl.i/us/ˈstel.θəl.i/