Warázu, also known as Pauserna or Guarasugwé (Guarasú'we), is a moribund Tupi–Guaraní language of Brazil.

Ramirez (2017) places the classification of Warázu in the Guaraní subgroup of the Tupi-Guarani languages as follows:[2] Speakers are also known as Guaraiutá, Guaraju, Pauserna, Guarasugwe, or Warazúkwe [waɾaðúkwe].

[2] Ramirez (2017) found only 2 remaining speakers of Warázu, an elderly couple consisting of Känä́tsɨ [kənə́tsɨ] (José Frei Leite) and Híwa (Ernestina Moreno).

[2][4][5] Traditionally, the Warázu people had lived in the following 7 villages along the banks of the Guaporé River.

Phonological inventory of Warázu:[2] Allophones: Syllabic structure is (C)V or (C)VV.