Which word describes someone stiffly proper?

The word "prim" is used to describe someone who is stiffly proper, often to the point of being overly formal or rigid in their demeanor and behavior. This term conveys a sense of decorum and a strict adherence to rules or expectations related to propriety. Individuals described as prim typically exhibit a reserved attitude, maintaining a careful and sometimes prudish manner in their interactions with others.

In contrast, "philistine" refers to a person whose interests or values may be considered shallow or lacking in cultural refinement, making it unrelated to the concept of being stiffly proper. "Perturbation" describes a state of anxiety or unrest, which does not connect with the notion of strict propriety. Lastly, "prescience" refers to the ability to foresee or predict future events, a concept distinct from the characteristics associated with being prim. Thus, "prim" directly aligns with the idea of someone being stiffly proper, making it the correct choice.