Unidentifiable (adjective)

Not able to be recognized or identified; not having a clear or distinct identity.

Origin:

Late 19th century: from un- (expressing negation) + identifiable.

Examples:

1. The unidentifiable substance was deemed hazardous, and a team of scientists was brought in to study it.
2. The unidentifiable criminal was caught thanks to eyewitness testimony, despite the suspect's attempts to disguise themselves.
3. The unidentifiable creature was discovered in the depths of the ocean, baffling scientists with its unique anatomy.
4. The unidentifiable language was studied by linguists, who were determined to uncover its origins.
5. The unidentifiable item was found in the archaeological dig, and experts were unable to determine its purpose.