n. & v.
n. 1 a speech defect in which s is pronounced like th in thick and z is pronounced like th in this. 2 a rippling of waters; a rustling of leaves.
v.intr. & tr. speak or utter with a lisp. lisper n. lispingly adv.
[ OE wlispian (recorded in awlyspian) f. wlisp (adj.) lisping, of uncert. orig. ]