indiscernible's Usage Examples:

In as much as designers herald their straps as being indiscernible to the average viewer, they have a distinct sheen and nothing can be done about that.

Their heavenly raiment was so smutty that its original color was indiscernible.

Much caution was displayed in guiding the dhow through these, for the channel was narrow, and darkness rendered its position almost indiscernible.

Synonyms:

undetectable, insensible, unperceivable, imperceptible,

Antonyms:

perceptible, visible, conscious, aware, sensible,