Which word conveys the idea of provincial or limited understanding?

The term that best conveys the idea of provincial or limited understanding is "insular." This word refers to a mindset or perspective that is narrow, isolated, or confined to a particular area or group, often resulting in a lack of exposure to wider ideas or experiences. It suggests a tendency to be closed off from external influences, thereby limiting one's understanding and awareness of broader contexts or viewpoints.

In contrast, the other words do not capture this specific nuance. "Intangible" relates to something that cannot be touched or easily defined, commonly referring to abstract concepts or qualities. "Intrepid" describes someone who is fearless or adventurous, highlighting courage rather than a limited perspective. "Inundate" means to overwhelm or flood, typically used in contexts of excessive amounts of something, such as information or water, and does not suggest any limited understanding. Thus, "insular" is the most appropriate choice for conveying the idea of restricted or limited comprehension in a broader context.