—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.
Derivatives:
lisper n. lispingly adv.
Etymology: OE wlispian (recorded in awlyspian) f. wlisp (adj.) lisping, of uncert. orig.
Useful english dictionary. 2012.