stealth
UK: stɛlθ | US: stɛlθ
n. the act of moving or acting secretly to avoid detection
adj. designed to avoid detection (e.g., stealth technology)
The word "stealth" originates from Old English stǣlþ, derived from stelan ("to steal") + the noun-forming suffix -þ (similar to "-th" in modern English, indicating a state or action). The root "steal" originally meant "to move secretly," which evolved into the broader concept of covert action. Over time, "stealth" came to describe any clandestine behavior or technology designed to evade detection, such as stealth aircraft.
The cat moved with perfect stealth, unnoticed by its prey.
Modern military aircraft use stealth to avoid radar detection.
He relied on stealth to sneak past the guards.
The spy’s mission required absolute stealth.
The thief operated under the cover of stealth.