建

Means “to erect, to set up, to establish, to build (a building, structure, or institution).”

Can also extend to abstract meanings such as “to found” or “to establish” (e.g., a nation, system, or policy).

A phono-semantic compound:

廴 (“to move forward, to extend”) provides the semantic element, suggesting movement or setting up;

聿 (yul/geon, “writing brush”) provides the phonetic element.

Appears in many common compounds:

建築 (건축) - architecture, construction;

建設 (건설) - to construct, construction;

建立 (건립) - to establish, to found;

建國 (건국) - founding of a nation;

建議 (건의) - proposal, suggestion.