Which of the following words means 'to illuminate or instruct?'

The word "edifying" is derived from the term "edify," which means to enlighten or instruct someone, particularly in moral or intellectual matters. It is often associated with the idea of providing education or insight that leads to moral or spiritual improvement. Therefore, "edifying" pertains to information or experiences that contribute positively to one’s learning or ethical development, making it the correct choice among the options provided.

In contrast, the other terms do not convey the idea of illumination or instruction. "Contemn" refers to treating something or someone with disdain or contempt; it implies a dismissive attitude rather than an educational one. "Dilatory" indicates a tendency to delay or procrastinate, showing a lack of promptness rather than any form of enlightenment. "Voracious" describes an insatiable appetite for something, often food, but can also refer to a keen enthusiasm for activities or subjects, yet it does not encompass the notion of instruction or guidance. Thus, "edifying" stands out as the appropriate word that encapsulates the concept of illuminating or instructing.