Tickle

To touch lightly, so as to produce a peculiar thrilling sensation, which commonly causes laughter, and a kind of spasm which become dengerous if too long protracted.

To please; to gratify; to make joyous.

To feel titillation.

To excite the sensation of titillation.

Ticklish; easily tickled.

Liable to change; uncertain; inconstant.

Wavering, or liable to waver and fall at the slightest touch; unstable; easily overthrown.

a cutaneous sensation often resulting from light stroking