IPA: /nɒnˈlɪŋɡwɪstɪk/
KK: /nɑnˈlɪŋɡwɪstɪk/
Not related to language or the use of language.
The study focused on nonlinguistic factors that influence communication.
Nonlinguistic → It is formed from "non-" (meaning not) and "linguistic" (from Latin "lingua", meaning tongue or language). The word "nonlinguistic" refers to something that is not related to language or does not involve language.
Think of 'non-' meaning 'not' and 'linguistic' relating to 'language' — so nonlinguistic means something that is not about language.