pre-speech
/ˌpriːˈspiːtʃ/adjective
1Of or relating to the period before the development of speech or speech sounds.
2Occurring before the giving of a speech.
noun
A form of communication preceding the development of speech or speech sounds; the sounds or utterances characteristic of this.
Origin
1920s; earliest use found in American Journal of Sociology. From pre- + speech.