Simple past tense and past participle of lisp.(verb)
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Use "lisped" in a sentence
"Josephine greatly; but the child was growing larger, an indiscreet word lisped by him, a childish remembrance, the least thing, might offend"
"Besides, in these days of universal knowledge, when we hear scientific terms lisped by infant lips, it is refreshing to see an example of fine old-fashioned ignorance."
"Madame de Montesquieu's visits were made only at long intervals, which distressed Josephine greatly; but the child was growing larger, an indiscreet word lisped by him, a childish remembrance, the least thing, might offend Marie Louise, who feared Josephine."