Esfinge (en. Sphinx)
/esˈfiŋxe/
Slang Meanings
A person who keeps their intentions secret.
That guy is a sphinx; I never know what he's really thinking.
Ese tipo es una esfinge, nunca sé lo que realmente piensa.
Something that is difficult to understand or interpret.
The economic situation is a sphinx for many.
La situación económica es una esfinge para muchos.