lisp
noun /lɪsp/
/lɪsp/
[usually singular]- a speech fault in which the sound ‘s’ is pronounced ‘th’
咬舌（语言缺陷，把 s 说成 th） - She spoke with a slight lisp.
她说话有点咬舌。
词源Old English wlispian (recorded in āwlyspian), from wlisp (adjective) ‘lisping’, of imitative origin; compare with Dutch lispen and German lispeln. - She spoke with a slight lisp.