stealth

/stɛlθ/
noun
  1. The quality of being quiet, careful, and secret in order to avoid being noticed.
    • He used stealth to sneak past the guard.
    • The spy relied on stealth to gather information.
    • The cat moved with stealth as it approached the bird.
  2. Technology or design that makes military aircraft, ships, or vehicles hard to detect by radar or other sensors.
    • The submarine's stealth allowed it to approach undetected.
    • The new fighter jet uses advanced stealth to avoid enemy radar.
    • Stealth technology has changed modern warfare.
Antonyms
adjective
  1. Designed to be difficult to detect, especially by radar.
    • The military tested a new stealth helicopter.
    • They developed a stealth drone for surveillance missions.
    • The stealth bomber flew over the city without being seen.