follow (road), pursue
辿 centers on moving along a path or trail: following a road, tracing a route, or pursuing someone or something step by step.
辿 combines 辶 (movement) with 山 (mountain), suggesting the idea of following a mountain path or trail. The exact historical development is uncertain, but the component combination fits the meaning of pursuing a route.
The movement radical 辶 wraps around a mountain 山. Picture yourself following a winding mountain road, step by step, pursuing the path ahead.
For テン, imagine following a trail of ten markers up the mountain: ten -> テン, and each marker guides your pursuit.