形容词

1. 看不见的;隐形的
If you describe something as invisible, you mean that it cannot be seen, for example because it is transparent, hidden, or very small.

1. not prominent or readily noticeable

e.g. he pushed the string through an inconspicuous hole
the invisible man

Synonym: inconspicuous

2. impossible or nearly impossible to see
imperceptible by the eye

e.g. the invisible man
invisible rays
an invisible hinge
invisible mending

Synonym: unseeable