tickle

(transitive) To touch repeatedly or stroke delicately in a manner which causes laughter, pleasure and twitching.

(transitive) To unexpectedly touch or stroke delicately in a manner which causes displeasure or withdrawal.

(intransitive, of a body part) To feel as if the body part in question is being tickled.

(transitive) To appeal to someone's taste, curiosity etc.

(transitive) To cause delight or amusement in.

(intransitive) To feel titillation.

(transitive) To catch fish in the hand (usually in rivers or smaller streams) by manually stimulating the fins.

(archaic) To be excited or heartened.