far
逖 centers on distance: something far away or remote.
逖 combines the movement radical 辶 with 狄, which likely contributes the sound. The exact historical development of 狄 is uncertain, but the character as a whole expresses distance or remoteness.
The movement radical 辶 suggests going far away, and the inner part 狄 looks like a distant figure with a beast 犭 and fire 火. Imagine traveling far beyond the campfire into the wild.
For テキ, picture a far-off target you want to reach: take -> テキ, and you must travel a long way to get there.