stealth

 
Pronunciation: /stɛlθ/

noun

  • 1 [mass noun] cautious and surreptitious action or movement: the silence and stealth of a hungry cat privatization by stealth
  • 2 [as modifier] (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