inaccessible

形容词 inaccessible:

1. capable of being reached only with great difficulty or not at all
   同义词：unaccessible
2. not capable of being obtained
   同义词：unobtainable, unprocurable, untouchable

1. A flexible fiber-optic instrument used to view an object or area, such as a body cavity, that would otherwise be inaccessible.
   纤维镜利用光学纤维制成的一种韧性仪器，用于对一些用其它方法无法接近的物体或区域(如体腔)进行检查
2. The cave is inaccessible, high up the top of a cliff which no one can climb.
   那个洞穴在没人能爬的高耸的悬崖顶上，无法进入。
3. His busy schedule made him completely inaccessible to his students.
   他的时间排得很满，学生根本无法和他接触。
4. The scientist discovered the plant in the most inaccessible reaches of the jungle.
   这位科学家在丛林深处最难进入的区域发现了这种植物。

in.ac.ces.si.ble

adj.（形容词）
Not accessible; unapproachable:
无法接近的；不能达到的：
例句：
inaccessible executives.
难以接近的经理们

【引伸】
in.acces.sibil.ity
n.（名词）
in.acces.sibly
adv.（副词）