indiscernible

Not capable of being discerned, of being perceived. / Not capable of being distinguished from something else.

Japanese Meaning

判別できない / 識別できない / 見分けがつかない

The difference between the two copies was so indiscernible that even experts couldn't tell them apart.

二つのコピーの違いは判別できないほどで、専門家でさえ見分けることができなかった。

Sense（1）

Not capable of being discerned, of being perceived.

The details of the room were indiscernible, lost in yellowish shadow.

Sense（2）

Not capable of being distinguished from something else.

more indiscernible

（ comparative ）

most indiscernible

（ superlative ）