This is the 13874th most frequent Spanish word.
sinuoso
Winding or curvy.
Here, 'sinuoso' is used to describe a road that has many curves, indicating its physical characteristic of being winding.
El camino sinuoso subía por la montaña.
The winding road climbed up the mountain.
Here, 'sinuoso' describes an explanation, signifying that it was convoluted or lacking clear direction.
La explicación que dio fue tan sinuosa que nadie la entendió.
The explanation he gave was so convoluted that nobody understood it.
In this case, 'sinuosa' is applied to a dance or movement to indicate smooth, flowing, and graceful curves.