He forfeited his health.

Otherwise, the whole claim is meritless, voided, and forfeited.

I turn to you, Mr. Holmes, as absolutely my last hope. If you fail me, then my honour as well as my position are forever forfeited.

If you agree to binding arbitration, you may forfeit some of your rights.

Witness, ye ashes of our comrades dear, / ye flames of Troy, that in your hour of woe / nor darts I shunned, nor shock of Danaan spear. / If Fate my life had called me to forego, / this hand had earned it, forfeit to the foe.

Tom was declared the winner by forfeit.

Thieving is thieving," said the Beast, "whether it be a rose or a diamond; thy life is forfeit."

He declared a forfeit.

The team had to forfeit the match due to lack of players.

We forfeited the game.