secretive
英 美
While the terror group established a large, secretive external operations wing bent on attacking the West, it has also cultivated a backup strategy of enabling and inspiring attacks by individuals.
虽然这个恐怖组织建立了一个庞大的、秘密的外部行动部门,致力于攻击西方,但它也形成了一种支持和鼓励个人发动袭击的后备战略。
He's very secretive about his work.
他对自己的工作讳莫如深。
Everyone is being very secretive'u2014there's something cooking.
人人都讳莫如深—准是在搞什么鬼把戏。