Frontier (noun) — الحدود: The border between two countries; the limit of knowledge in a field. Below are 8 words with a similar meaning; the linked ones have full GL Dictionary entries with their meaning in Arabic.
Border; limit; edge; demarcation; frontier; dividing line; perimeter
A point beyond which something cannot or may not go; to restrict.
An edge or border; the grass edge of a road.
The edge or border of something, such as blank space around text; also the difference between two amounts, as in profit margin.
borderedgecutting edgeoutpost