Curvetting refers to a horse riding movement where the animal performs a graceful and fluid jump or bend. Antonyms for "curvetting" would include words such as "stagnant," "stiff," and "immobile." These words describe a lack of movement or a lack of fluidity in movement, which is the opposite of what curvetting represents. Other antonyms for curvetting include words such as "awkward," "clumsy," and "unnatural," which convey a sense of a lack of grace and coordination in movement. It's important to understand multiple antonyms for curvetting as different adjectives can denote different aspects of movement that are opposite to the fluidity and gracefulness of curvetting.