Vellicate is a term used to describe a sudden, sharp sensation on the skin. It can be caused by a light touch, such as a feather, or a more intense stimulus, such as a pinch. The crossword solutions for this term are LUG (3 letters) and JERK (4 letters). LUG is an informal verb meaning to pull or drag something with effort, while JERK is an informal verb meaning to move suddenly and sharply. Both of these words can be used to describe the sensation of vellication.