Translation of "изнеможения" in English

Я работаю до изнеможения.

I work until I can't anymore.

Том работал до изнеможения.

Tom worked until he was too tired to continue.

Он вернулся домой, уставший до изнеможения.

He came home dead tired.

Уставшая до изнеможения, она тотчас крепко заснула.

- Being exhausted, she was soon fast asleep.
- She was soon sound asleep because she was very tired.

Она плавала до изнеможения и затем отправилась домой.

She swam until she was exhausted and then went back to the house.