lisp suomeksi - Sanakirja.org (englanti-suomi)

To pronounce the sibilant letter ‘s’ imperfectly; to give ‘s’ and ‘z’ the sounds of ‘th’ — a defect common amongst children.
To speak with imperfect articulation; to mispronounce, as a child learning to talk.
To speak hesitatingly and with a low voice, as if afraid.
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.
To speak with reserve or concealment; to utter timidly or confidentially.

As yet a child, nor yet a fool to fame, / I lisped in numbers, for the numbers came.
Lest when my lisping, guilty tongue should halt.
to speak unto them after their own capacity, and to lisp words unto them according as the babes and children of that age might sound them again
to lisp treason

Partisiipin perfekti	lisped
Imperfekti	lisped
Partisiipin preesens	lisping
Monikko	lisps
Yksikön kolmannen persoonan indikatiivin preesens	lisps

Sanakirja.org