Which word can be used to describe a "wandering" or "rebel" individual?

The correct choice, "renegade," effectively describes an individual who is wandering or rebel-like in nature. A renegade typically refers to someone who rejects lawful or traditional behavior, often opting for a lifestyle that defies established norms and conventions. This term conveys a sense of rebellion, as it is commonly associated with those who choose to act independently and often in opposition to accepted authority or ideology.

The other options possess meanings that do not align with the notion of being a wandering or rebellious individual. "Voluminous" refers to something large in volume or size, "martinet" describes a strict disciplinarian, particularly in context to military authority, and "squalid" pertains to a state of being extremely dirty or filthy, neither of which captures the essence of rebellion or wandering. Thus, "renegade" is the most appropriate term to convey the idea of a nonconformist or someone who strays from the established path.