gentle, graceful, slight, smooth, soft
sharp, tight
sweeping, wide
sensual, voluptuous
the voluptuous curve of her hips

feminine curves, womanly curves
downward, upward
natural
the natural curve of your spine

form, make
The seats were arranged to form a curve.

in a curve
The road follows the coast in a wide curve.

curve of
the curve of his neck

hug sb's curves
The evening dress hugged her curves beautifully.

sharp, tight
The road went around in a tight curve.

come around, hug, negotiate, round
He slowed down to negotiate the curve.

around a/the curve
The car vanished around a curve.

at a/the curve
Slow down at the curves.

into a/the curve
A good motorcyclist leans into the curves.

curve in
a curve in the road

steep
bell
normal, standard
growth
grading (= of students' grades)
learning (= the rate at which you learn sth new)
Start-up businesses often have a steep learning curve.

plot

flatten out
indicate sth, show sth

grade on a curve (= to adjust scores so that they fit a normal curve)