The word "wigglier" is an adjective that means tending to wiggle or move around a lot. Some possible antonyms for this word include still, steady, motionless, rigid, and stable. If you are describing something as "wigglier," you might be indicating that it is not very secure or firm. Therefore, you could use antonyms such as secure, firm, strong, fixed, or unyielding to describe something that is more stable or dependable. These antonyms can help you create a more precise and accurate picture of the subject you are describing, helping you to better convey your intended meaning to your audience.