How do you say "Good luck" in Hindi?
Like saying "Good luck on the test"

Question

Answer

गुड लक means खुशकिस्मती  (khushakismati, khushakismatee) or  सौभाग्य  (saubhagy, saubhaagy) 
Simply "Good luck" in Hindi is:
Shubh Kaamnaayein शुभ कामनाएँ

Synonyms
break, happy chance, fluke, good fortune, luckiness

Antonyms
Definitions
noun
an auspicious state resulting from favorable outcomes
a stroke of luck
an unexpected piece of good luck.