sociolinguistics

socio- +‎ linguistics.

• (General American) IPA^(key): /ˌsoʊsi.oʊlɪŋˈɡwɪstɪks/
• (Received Pronunciation) IPA^(key): /ˌsəʊsi.əʊlɪŋˈɡwɪstɪks/, /ˌsəʊʃjəʊlɪŋˈɡwɪstɪks/

sociolinguistics (uncountable)

1. (linguistics) The study of social and cultural effects on language and vice-versa.
   • 2014 January, Claire Kramsch, “Language and Culture”, in AILA Review‎, volume 27, number 5, John Benjamins, →DOI, →ISSN, page 30:

     This paper surveys the research methods and approaches used in the multidisciplinary field of applied language studies or language education over the last fourty^[sic] years. Drawing on insights gained in psycho- and sociolinguistics, educational linguistics and linguistic anthropology with regard to language and culture, it is organized around five major questions that concern language educators.

• microsociolinguistics
• macrosociolinguistics

• sociolinguist
• sociolinguistic

• sociolect