stealth
noun
[ stɛlθ ]
• cautious and surreptitious action or movement.
• "the silence and stealth of a hungry cat"
Similar:
furtiveness,
secretiveness,
secrecy,
surreptitiousness,
sneakiness,
slyness,
covertness,
stealthiness,
clandestineness,
• (chiefly of aircraft) designed in accordance with technology which makes detection by radar or sonar difficult.
• "a stealth bomber"
Origin:
Middle English (in the sense ‘theft’): probably representing an Old English word related to steal, + -th2.