smooth
Definitions
Having an even and regular surface; free from perceptible projections, bumps, or indentations.
Moving or progressing without jerks, obstacles, or harsh transitions.
Characterized by a pleasing, refined, or sophisticated quality.
Examples
The surface of the lake was perfectly smooth and reflected the mountains.
She gave a smooth performance that impressed all the judges.
Adding a little cream will make the sauce taste rich and smooth.