even, still, yet
Aun si cantas desafinado, acompáñanos.
Even if you sing out of tune, join us.
No me importaría aun si ella no viene.
I wouldn't mind even if she doesn't come.
Quienquiera que se calle aun si tiene razón, está casado.
Anyone who remains silent even if they are right, is married.
Aun yendo más rápido, no llegaremos a tiempo.
Even if we go faster, we won’t arrive on time.
Doctor, pensé que aun teniendo un arma no pasaría nada.
Doctor, I thought that even having a gun wouldn't hurt.
— Carandiru (2003)