The Mura-Matanawí languages are a proposed language grouping consisting of the Mura language (with the Pirahã dialect) and extinct Matanawí. Glottolog evaluates it as "promising" but does not rule out chance for the similarities. The family was first proposed by Curt Nimuendajú in 1922.
Language contact For the Mura-Matanawi languages, Jolkesky (2016) notes that there are lexical similarities with the Kwaza, Taruma, Katukina-Katawixi, Arawak, Jeoromitxi, Tupi, and Arawa language families due to contact.
Comparison Comparison of basic vocabulary in Matanawí and Mura-Pirahã by Diego Valio Antunes Alves (2019: 86), with data of both languages cited from Curt Nimuendajú (1925):Nimuendajú, Curt. 1925. As Tribus do Alto Madeira. Journal de la Société des Américanistes XVII. 137–172. (PDF) Portuguese gloss (original)English gloss (translated)MatanawíMura-Pirahãlínguatongueihuzɨipopajlábiolipɲaruzɨohᴐapipajorelhaearatahuzɨapopajcabelohairapa zi jaaapapatajcoxathigharitʊzɨ, aritᴐziakuapajbocamouthɲaru zɨkaopajdentetootharɨzɨatopajnariznosenatuziitopajolhoeyetuʃijikupajbraçoarmapijiatoewemãohandũsu zɨupajunha da mãofingernailũsuzɨhᴐupapajpernalegaturazɨipopajpéfootiʃijɨapajáguawaterapɨpefogofireuawaichuvarainapɨpeluamoonkakahaiaiterraearthwɨsabegepedrastoneajaaapuujsolsunviːwesecasahousepiatajredenetapiapiʃaraflechaarrowawɨapoahajpentecombparataisoweesteiramatkɨnũpahoesepanelapanwatawaajpaus para produzir fogosticks for starting fireɨiemelhoneyʦɨzaahajmilhomaizeiwaritihuahajmandiocamaniocmĩiʃehetabacotobaccoɨsəkiiʧehe
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