desconocido

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

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

Tom is an unknown artist. - Tom es un artista desconocido.

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