TICK'LE, verb transitive [Latin titillo, corrupted.] 1. To touch lightly and cause a peculiar thrilling sensation, which cannot be described. A slight sensation of this kind may give pleasure, but when violent it is insufferable. 2. To please by slight gratification. A glass of wine may tickle the palate. Such a nature Tickled with good success. TICK'LE, verb intransitive To feel titillation. He with secret joy therefore Did tickle inwardly in every vein. TICK'LE, adjective Tottering; wavering, or liable to waver and fall at the slightest touch; unstable; easily overthrown. Thy head stands so tickle on thy shoulders, that a milkmaid, if in love, may sign it off. The state of Normandy Stands on a tickle point. [This word is wholly obsolete, at least in noun England. Ticklish is the word used.]
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI