Because the hiragana ends with an う sound, you know this word is a verb. The kanji itself means suspend, but in this case, you're going to suspend your win or loss and try to stake it all on one, big bet. You're going to risk it all!
You decide to risk it all and bet everything on your car (か). If you lose, you lose the car, but if you win, then you were right to stake it all on this.
Do you have something to put your life on the line for?