IPA: /ˈlɪspər/
KK: /ˈlɪspər/
A person who speaks with a speech defect that causes them to pronounce 's' and 'z' sounds like 'th'.
The child was a lisper, but with speech therapy, he improved his pronunciation.
Lisper → The word 'lisper' is derived from 'lisp' (from Old English 'lispian', meaning to speak with a lisp) and the suffix '-er' (meaning a person who). A lisper is a person who speaks with a lisp, characterized by difficulty in pronouncing certain sounds, particularly 's' and 'z'.
Think of someone who 'speaks' ('lisp') in a particular way, and the '-er' indicates that this person has that specific way of speaking.