What kind of effects does something described as "pernicious" typically have?

When something is described as "pernicious," it typically refers to effects that are harmful in a gradual and subtle way. The term suggests that the damage may not be immediately evident, allowing negative consequences to accumulate over time without prompt detection. This is often seen in contexts such as certain social issues, health problems, or even environmental factors, where the detrimental influences are pervasive but may not strike immediately or cause a quick reaction.

In contrast, describing something as having immediate and visible effects implies an outright and sudden impact, which differs from the under-the-surface nature of pernicious influence. Similarly, labeling something as harmless or benign means it does not cause harm at all, while positive or uplifting outcomes indicate beneficial effects, both of which contradict the negative connotation of "pernicious." Thus, the characterization of pernicious effects aligns well with the idea of being gradual and subtle, distinguishing it from other descriptors.