vellicate
To touch (a body part) lightly so as to excite the surface nerves and cause uneasiness, laughter, or spasmodic movements.
transitive
Convulſions ariſing from Some Acrimony in the Stomach, or from ſomething vellicating a Nerve in its Extremity, and not in its Original where it ariſeth from the Brain, are not very dangerous.
To twitch or move convulsively.
intransitive
To tickle, provoking twitching and laughter.
transitive
To criticize in a somewhat irritating way; to carp at.
figuratively, transitive
Sir, I Have received yours, and reading the Confirmation of your Hypotheſis (which I took the boldneſs a little to vellicate) and your Anſwer to my Objections againſt it, I could not but obſerve your ingenious dexterity therein with pleaſure.
Where it comes from
From Latin vellicatus, past participle of vellicare (“to twitch”). Cognate with Spanish pellizcar (“to pinch”).
Adapted from the Wiktionary entry vellicate (CC BY-SA 4.0).