This is the 9627th most frequent Japanese word.
股
"股" (mota) refers to the "thigh," "groin," or "leg branch" (e.g., split/branching parts of the body).
Here, '股' refers to the groin area or the inner side of the thighs, commonly used to describe the posture of spreading legs.
彼は股を広げて座っています。
He is sitting with his legs spread.
In this context, '股' is part of the compound term '股関節' meaning 'hip joint', indicating a specific anatomical location in the body.
股関節が痛いです。
My hip joint hurts.
The word '股' is used metaphorically to describe the forked shape of the road, resembling the division like a human's groin area.