invisible

Adjective

• not prominent or readily noticeable
  • he pushed the string through an inconspicuous hole
    
  • the invisible man
    

• impossible or nearly impossible to see; imperceptible by the eye
  • the invisible man
    
  • invisible rays
    
  • an invisible hinge
    
  • invisible mending
    

Related words

• Synonyms: 
  inconspicuous , unseeable
• Antonyms: 
  conspicuous , visible , seeable