Русско-англо-русский юридический словарь

Bonded labour is the most widespread – yet the least known - form of slavery in the world. A person becomes a bonded labourer when their labour is demanded as a means of repayment for a loan. The person is then tricked or trapped into working for very little or no pay. The value of their work becomes invariably greater than the original sum of money borrowed. Often the debts are passed onto the next generations. (antislavery.org)

It is from communities like this that people are liable to be drawn into a system known as bonded labour. Typically a broker finds someone a job and charges a fee that they will repay by working - but their wages are so low that it takes years, or even a whole lifetime. Meanwhile, violence keeps them in line. (BBC News)