"lisp" in the noun sense
1. lisp
a speech defect that involves pronouncing `s' like voiceless `th' and `z' like voiced `th'
2. LISP, list-processing language
a flexible procedure-oriented programing language that manipulates symbols in the form of lists
"lisp" in the verb sense
1. lisp
speak with a lisp
Source: WordNet® (An amazing lexical database of English)
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