1. (v. i.) To pronounce the sibilant letter s imperfectly; to give s and z the sound of th; -- a defect common among children.

2. (v. i.) To speak with imperfect articulation; to mispronounce, as a child learning to talk.

3. (v. i.) To speak hesitatingly with a low voice, as if afraid.

4. (v. t.) To pronounce with a lisp.

5. (v. t.) To utter with imperfect articulation; to express with words pronounced imperfectly or indistinctly, as a child speaks; hence, to express by the use of simple, childlike language.

6. (v. t.) To speak with reserve or concealment; to utter timidly or confidentially; as, to lisp treason.

7. (n.) The habit or act of lisping. See Lisp, v. i., 1.

aphonia artificial voice assibilate assibilation broken speech broken tones broken voice buzz childish treble choked voice cracked voice croak crow drawl dysarthria dyslalia dyslogia dysphasia dysphonia dysphrasia effervesce effervescence effervescing falsetto fizz fizzle fizzling frication frictional rustling harshness hawking voice hiss hissing hoarseness hush hushing idioglossia idiolalia impairment of speech lisping loss of voice mince muzzy speech nasal tone nasalization quaver rhonchus shake shush shushing sibilance sibilate sibilation siffle sigmatism siss sissing sizz sizzle sizzling sneeze sneezing sniff sniffle snore snort snuff snuffle speech defect speech impediment spit splutter sputter squash squelch squish sternutation stertor swish talk incoherently tremor twang wheeze whish whistle whistling white noise whiz whoosh zip