疆

Boundary, border, frontier. Specifically denotes the limit of political sovereignty or territorial control—the "hard edge" of a domain.

Primarily used as a noun to denote the physical marches of a territory or the abstract limit of authority. In compounds such as 疆域 (jiāngyù), the meaning shifts from the linear boundary (the line) to the encompassing territory (the area). Often functions as a terminal point; when paired with verbs of movement, it typically marks the limit of an advance or the furthest extent of reach.

• vs. 境 (jìng): While 境 can refer to a general region, an environment, or a state of being, 疆 is typically restricted to the political or military frontier.
• vs. 界 (jiè): While 界 often denotes a dividing line, a category, or a conceptual sphere, 疆 specifically concerns territorial jurisdiction and the maintenance of that limit.

Semantic variants include 彊 (U+757A) and 強 (U+5C07). There is significant phonetic and semantic overlap between 疆 (boundary) and 強/彊 (strong, stiff, forceful), and these glyphs may be interchangeable in early strata of text.

If "border" or "frontier" produces a nonsensical reading in context, test the glyph as a variant for "strength," "force," or "rigidity." The shared conceptual root is tension (as in a stretched bowstring).