Invisibility

Noun:

the quality of not being perceivable by the eye

用作名词 (n.)

The ink had faded toinvisibility.
　　墨水已退色看不见了。

For Americans,the distinction between a friend and a co-worker blurs to nearinvisibility.
　　对美国人来说，朋友和同事之间的界限几乎已经模糊到看不见的程度。

Glyph ofInvisibilityduration has been increased.
　　隐形术雕文的持续时间增加。