vernost

1. loyalty; faithfulness
   Pas je simbol vernosti. — The dog is a symbol of loyalty.
   Cenim njegovu vernost klubu. — I value his loyalty to the club.
2. (in a marriage or couple) fidelity
   Za nju je vernost u braku najvažnija. — For her, fidelity in marriage matters most.
3. (of a translation or copy) faithfulness; accuracy
   Kritičari hvale vernost ovog prevoda. — Critics praise the faithfulness of this translation.

The person or thing one is loyal to is usually in the dative: vernost domovini, vernost mužu.