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The term that refers to slavery or forced labor is "servitude." This word specifically denotes a condition in which an individual is bound to work for another person or entity, often without the freedom to leave or choose their activities. Servitude can encompass various forms of labor that are involuntary, emphasizing the lack of agency that the person in this situation has over their work and life choices.

In this context, "subservience" implies a state of being submissive or obedient, which does not necessarily capture the aspect of forced labor. "Exodus" refers to a mass departure of people, typically used in a historical or migratory context, and does not pertain to the notion of forced labor. "Castigation" involves severe criticism or punishment, which is unrelated to the concept of slavery or forced labor. Thus, "servitude" is the most accurate term to describe the condition of being enslaved or compelled to work against one's will.