The word "孤陋" is formed by combining two characters: "孤", meaning alone or isolated, is constructed from the semantic radical "子" (child) and the phonetic component "瓜"; "陋", meaning coarse or shallow, is constructed from the semantic radical "阝" (terrain) and the phonetic component "㔷". Together, they form a compound where the individual meanings merge to convey narrow-mindedness or ignorance, emphasizing both isolation and lack of refinement.