Meaning

Sunya® (the "u" pronounced as the "oo" in the word "book)" is a word from Sanskrit, the ancient and clasical language of India. Our modern number system was invented in India 1,500 years ago.  

Sunya® has the meaning of being empty or without any quantity. When a player goes out of cards to win the game he/she says "sunya" asserting his/her hands are out of number cards and he/she has won the game.