en_tn/rom/11/10.md

bend their backs continually

Here "bend their back" is a metonym for forcing slaves to carry heavy loads on their backs. This is a metaphor for making them suffer. Alternate translation: "make them suffer like people carrying heavy loads" (See: rc://en/ta/man/translate/figs-metonymy and rc://en/ta/man/translate/figs-metaphor)