stealth
/stelθ/noun
1
- mass noun cautious and surreptitious action or movement秘密行动, 背人的活动：
the silence and stealth of a hungry cat
一只饥饿的猫默不作声和悄悄的活动
privatization by stealth.
偷偷地私有化。
2
- as modifier(chiefly of aircraft) designed in accordance with technology which makes detection by radar or sonar difficult（主要指飞机）隐形：
a stealth bomber.
一架隐形轰炸机。
词源
Middle English （in the sense 'theft'）： probably representing an Old English word related to STEAL, + -TH2.