限界线

• 阝(mound; region of land)RADICAL
• 艮(stop; firm)PHONO-SEMANTIC

A tall earthen wall stands firmly to block everything and create an impassable boundary.

• 田(field; land)RADICAL
• 介(in the middle; separate)PHONETIC

A boundary is the dividing line between separate fields.

• 糸(thread; silk)RADICAL
• 泉(stream; water)PHONETIC

A thin thread flows like a small stream running long and continuously.