Indiscernible (adjective)

Not able to be distinguished or perceived; not discernible; indistinguishable.

Origin:

Indiscernible is derived from the prefix "in-" meaning "not" and "discernible" which means "able to be distinguished or perceived.".

Examples:

1. The two pills were indiscernible from each other.
2. The handwriting was indiscernible, making it hard to read.
3. The difference between the two paintings was indiscernible to the untrained eye.
4. The indistinct sound was indiscernible over the noise of the crowd.
5. The indiscernible shape in the dark made it hard to identify what it was.