unseeable

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

impossible or nearly impossible to see;
imperceptible by the eye
- the invisible man
- invisible rays
- an invisible hinge
- invisible mending
• Syn:
invisible
• Ant:
visible (for: invisible)
• Similar to:
camouflaged, concealed, hidden, out of sight, infrared,
lightless, nonvisual, occult, ultraviolet, undetectable, unseeyn
• See Also:
imperceptible, unperceivable, covert
• Derivationally related forms:
invisibleness (for: invisible), invisibility (for: invisible)