Vellicates is a word that means to irritate or provoke in a mildly annoying way. Some antonyms for this word could include calm, soothe, comfort, placate, pacify, or appease. Rather than irritating or agitating, these words imply a sense of relaxation, ease, or serenity. They suggest an atmosphere of calm and contentment, rather than one of irritation or restlessness. Other antonyms might include subdue, quell, or suppress, suggesting a sense of control or restraint rather than provocation. Ultimately, the antonyms for "vellicates" emphasize a sense of peace, either through soothing or controlling one's environment.