lisp
noun /lɪsp/
/lɪsp/
[usually singular]- a speech fault in which the sound ‘s’ is pronounced ‘th’
- She spoke with a slight lisp.
Word OriginOld English wlispian (recorded in āwlyspian), from wlisp (adjective) ‘lisping’, of imitative origin; compare with Dutch lispen and German lispeln.