path, way, guide, lead, proceed, advance, reach, arrive
廸 centers on a path or way, and by extension the act of guiding, leading, or proceeding along it to reach a destination.
廸 combines the movement enclosure 廴 with 由, which likely contributes a sound element. The character is associated with paths and leading, but the exact historical development is uncertain.
The enclosure 廴 suggests movement or extension, and 由 can be seen as a starting point or reason. Together they form a path that guides you from a starting point to a destination.
For テキ, imagine a tech-savvy guide leading the way with a digital map: tech -> テキ, and the guide shows the path.