nepogrešiv

1. (of a person) infallible
   Niko nije nepogrešiv, ni ti. — Nobody is infallible, not even you.
2. (of instinct, a sign) unerring; unmistakable
   Ima nepogrešiv osećaj za modu. — She has an unerring sense of fashion.
   To je nepogrešiv znak da dolazi kiša. — That's an unmistakable sign that rain is coming.