1. Procedures, techniques, or processes whose nature, origin, or implementation are not known or understood
The scientist discovered the disease was spreading through unknown methods.
O cientista descobriu que a doença estava se propagando através de métodos desconhecidos.
2. Unidentified or unconventional approaches to achieving a goal
They achieved success using unknown methods that surprised the industry.
Eles alcançaram sucesso usando métodos desconhecidos que surpreenderam a indústria.