desconocido

listen to the pronunciation of desconocido
Spanisch - Englisch
someone or something that is unfamiliar
confidential
fameless
unbeknown
newcomer
unknown

Many great thinkers who were unknown while alive became famous after death. - Muchos prominentes pensadores que fueron desconocidos en vida se hicieron famosos después de su muerte.

The symbol X usually stands for an unknown quantity in mathematics. - La letra x en matemáticas usualmente representa un valor desconocido.

unknown, someone or something which is not known
undiscovered
unknown person
complete stranger