desconocido

listen to the pronunciation of desconocido
الأسبانية - التركية
الأسبانية - الإنجليزية
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.

It is estimated that a great part of his inventions would remain unknown to the date. - Se estima que una gran parte de sus inventos permanecerían desconocidos hasta la fecha.

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