Nondescript vs. Indescript

Lacking distinctive qualities; having no individual character or form

(rare) undescribed

Not described (in the academic literature).

Without distinguishing qualities or characteristics.

A species or other type of creature that has not been previously described or identified.

An undistinguished, unexceptional person or thing.

(UK) An unmarked police car.

Not hitherto described;

Dull or uninteresting; undistinguished.

A thing not yet described; that of which no account or explanation has been given; something abnormal, or hardly classifiable.

a person is not easily classified and not very interesting

lacking distinct or individual characteristics; dull and uninteresting;