廓

Phono-semantic compound:

广 (집 엄, “building, shelter”) — semantic, indicating a structure or boundary.

郭 (둘레 곽, “outer wall, surrounding area”) — phonetic, also reinforcing the sense of “enclosure.”

Thus 廓 depicts “a broad or walled space under a roof,” extending to mean both a perimeter wall and the quality of spaciousness.

성곽 (城廓) — city walls, fortress walls

외곽 (外廓) — outskirts, periphery

광곽 (廣廓) — vast and wide

내외곽 (內外廓) — inner and outer walls

Historically, 廓 was closely tied to 城 (성, “city”) and 郭 (곽, “outer wall”), often appearing in compounds about fortified settlements.