[verb] touch (a body part) lightly so as to excite the surface nerves and cause uneasiness, laughter, or spasmodic movements Synonyms: titillate, vellicate
[verb] feel sudden intense sensation or emotion; "he was thrilled by the speed and the roar of the engine" Synonyms: thrill, vibrate
[verb] touch or stroke lightly; "The grass tickled her calves"