The phrase "in fetters" refers to being bound or restrained in some way. There are several synonyms for this phrase that convey a similar meaning, including "chained," "shackled," or "handcuffed." Other options include "restricted," "hindered," or "constrained." These words all suggest a lack of freedom or movement, whether physical or metaphorical. Additionally, one might use more colorful language to describe this feeling, such as saying someone is "imprisoned in their own life" or "trapped in a hamster wheel." Ultimately, any of these synonyms would be appropriate for conveying the sense of being confined or held back.