Usage of "break one's back"

Portuguese

Work very hard, like a slave.

Synonyms

Examples for "slave"

In Brazil sugar was the great slave labor staple; in America, cotton. 
 The Journal of Negro History, Volume 7, 1922 

As a result, the slave will contain different data than the master. 
 High performance mysql, 2nd edition 

I believe the government cannot endure permanently half slave and half free. 
 A. lincoln: a biography 

I think they were held there in human-trafficking, slave conditions, Franklin said. 
 The Guardian 

As a result, the slave's data will be different from the master's. 
 High performance mysql, 2nd edition 

Towards the end we had to buckle down to more serious stuff. 
 The millionaire's rebellious mistress 

I was determined to buckle down for what remained of the semester. 
 The Demon Lover 

Just buckle down to this for a while and see how it goes. 
 The Evolution of "Dodd" / A pedagogical story giving his struggl... 

Work is the thing, and I'll buckle down to it again. 
 In Friendship's Guise 

I'm going to buckle down until the term is over, honest I am. 
 Walter and the Wireless 

What matters is being able to knuckle down when things get serious. 
 The Irish Times 

But the commander refused to knuckle down to any show of arrogance. 
 Treachery in Outer Space 

Expect Mackenzie to knuckle down on project execution, boost productivity and cut costs. 
 Reuters 

But she had to knuckle down-takethe easy way for her. 
 Poor Man's Rock 

He circled to her back and stroked a knuckle down the exposed skin. 
 Shadow fall 

Usage of break one's back in English

"My goodness," he whispered to Ned, "that all-fours' work is enough to break one's back, Ned." 
 In Times of Peril: A Tale of India 

Translations for break one's back

Portuguese

Meanings of break one's back in English