Below
Down, Under, Beneath
There's a toe below ground.
か, げ
した, さ, くだ, お
None
You keep digging for the toe below the ground, and instead of hitting a toe you hit something hard and metallic. You keep digging and digging around it, but it's huge. Turns out, you found yourself a car (か). Keep digging until you unearth the car. Inside, you find the toe you were looking for.