lallate

present singular third person lallates · participle present lallating · participle past lallated · past lallated

1. To speak pronouncing the letter "r" so that it sounds like "l".
2. To speak like a baby.

   […] he was pulled in by the smell of fresh coffee and the sound of Isabel and Rosalinda burbling and lallating together.

   2008, Clive Hazell, The Room

   2 more examples

   […] the therapist would start tiresomely lallating over and over and over again what her therapeutic philosophies and goals and wishes for the depressed person were […]

   2014, David Foster Wallace, The David Foster Wallace Reader

   Meanwhile I go on troweling, slavering the world with language as Jake squeals like a held bird and begins lallating to me in tongues.

   2014, William Roetzheim, The Giant Book of Poetry