GAMBLING
gambling, gaming, play
(noun) the act of playing for stakes in the hope of winning (including the payment of a price for a chance to win a prize); āhis gambling cost him a fortuneā; āthere was heavy play at the blackjack tableā
Source: WordNet® 3.1
Verb
gambling
present participle of gamble
Noun
gambling (usually uncountable, plural gamblings)
An activity characterised by a balance between winning and losing that is governed by a mixture of skill and chance, usually with money wagered on the outcome.
Source: Wiktionary
GAMBLE
Gam"ble, v. i. [imp. & p. p. Gambled; p. pr. & vb. n. Gambling.]
Etym: [Dim. of game. See 2d Game.]
Definition: To play or game for money or other stake.
Gamble, v. t.
Definition: To lose or squander by gaming; -- usually with away. "Bankrupts
or sots who have gambled or slept away their estates." Ames.
Source: Webster’s Unabridged Dictionary 1913 Edition