Which term best fits the definition of relentless menial work?

The term that best fits the definition of "relentless menial work" is drudgery. This word specifically refers to tedious, low-level tasks that require sustained effort without any significant reward or enjoyment. It encapsulates the idea of hard, monotonous work that can feel unending and is often viewed as unskilled or lacking in variety.

In the context of the other terms, credulous refers to someone who is overly willing to believe something without sufficient evidence; deride means to ridicule or mock; and induce implies causing something to happen or leading someone to a particular action or conclusion. None of these terms convey the sense of monotonous and laborious work that drudgery does, making it the most accurate representation of relentless menial work.