backbreaking task

Translations
тяжелая задача
Building the stone wall was a backbreaking task.
Строительство каменной стены было тяжелой задачей.
Definitions
A backbreaking task is a job or activity that is extremely hard, physically demanding, and exhausting, often requiring a lot of effort and causing fatigue.
Words
backbreaking

adjective
изнурительный
task

noun
задача