Become a dinosaur
Wavy is correct.
My guess is that when the baby starts clawing at your insides, that you will become aware of the existence of its fingernails.
The fingernails are distal to the wrist. The wrist is proximal to the fingernails.
If you are referring to wavy hair, or a wavy line, it is "ondulé/-e."
a wavy rectangle
Wavy.
Wavy in Spanish is ONDULADO which means curly
She has wavy hair. The wavy pattern of that wallpaper is making me feel ill.
As undulate means to rise and fall, become wavy or rippled, an antonym would be to "roughen".
penta-fingernails
you duct tape their fingernails and when they forget that the pick their fingernails and then its all done