Unrecognized (adjective)

1. Not recognized or acknowledged.
2. Not known or familiar.
3. Not officially or legally recognized or accepted.
4. Not having received the recognition, respect, or attention that one deserves.

Origin:

Late 16th century: from un- (expressing negation) + recognized, past participle of recognize.

Examples:

1. The singer remained unrecognized for many years.
2. The unrecognized contributions of women to the field of science.
3. The unrecognized country was denied entry to the international community.
4. The unrecognized talent was finally discovered by a famous producer.
5. The unrecognized hero saved many lives during the disaster.