karo

1. (in cards) diamonds
   Adut je karo. — Diamonds are trumps.
   Izvukao sam karo damu. — I drew the queen of diamonds.
2. (pattern on fabric) check; plaid
   Kupila je karo suknju. — She bought a plaid skirt.
   Ove zime karo je ponovo u modi. — This winter plaid is back in fashion.

It stays unchanged before a card name: karo kralj, karo dama. It is likewise unchanged as a modifier before a noun in the sense "check": karo košulja, karo šara.