Translation guide
Describes something that cannot be identified, recognized, or determined. The most natural Japanese expressions depend on what is unidentifiable (object, person, cause, etc.) and the context.
The cause is unidentifiable.
Expressing that something cannot be identified or recognized in a general sense.
Literally 'cannot specify/identify'. A common, neutral way to say something is unidentifiable. Used for objects, people, causes, etc.
The object was unidentifiable.
The cause is unidentifiable.
Means 'cannot distinguish/identify'. Often used when something cannot be told apart from others or recognized visually.
The fingerprint was unidentifiable.
Means 'identity unknown'. Often used for mysterious objects, creatures, or people whose true nature is unknown.
An unidentifiable flying object was sighted.
Means 'cannot distinguish/judge'. Used when something cannot be determined or differentiated, often in technical or analytical contexts.
The signal is unidentifiable from noise.
Referring to a person whose identity cannot be determined.
Describing a sound or voice that cannot be recognized.
特定できない is broader and means 'cannot pinpoint/specify'. 識別できない is more about distinguishing one thing from another, often visually or by characteristics.
There is no single adjective 'unidentifiable' in Japanese. Use phrases like 特定できない or 正体不明 depending on context. Direct translations like 'アイデンティファイできない' are unnatural.
The remains were unidentifiable.
The source of the smell is unidentifiable.
An unidentifiable person was standing in front of the house.
Late at night, an unidentifiable sound echoed.