端たん線せん

noun

edge; border line

Refers to a physical edge or boundary line, often in technical or formal contexts such as sports courts, diagrams, or maps.

• テニスコートの端たん線せんを踏ふまないように注ちゅう意いしてください。

  Please be careful not to step on the edge line of the tennis court.

• 図ず面めんの端たん線せんがかすれて見みえにくくなっている。

  The border line on the drawing has faded and become hard to see.