fork in road, branching off
歧 centers on a point where a path splits into two or more directions: a fork in a road or a branching off from a main route.
歧 combines 止 (foot, stop) with 支 (branch, support), suggesting a place where a path branches or diverges. The exact historical development is uncertain, but the component combination fits the meaning of a fork in the road.
The left side 止 looks like a foot stopping at a junction, while the right side 支 resembles a branching support. Picture a foot pausing where the road splits into branches.
For キ, imagine a key decision at the fork: key -> キ, and you must choose which branch to take.