Where does “Iperuûasu” come from?

Iperuûasu (Old Tupi) comes from Old Tupi -gûasu, from Proto-Tupi-Guarani *-wat͡ʃu — augmentative suffix.

Ancestry of “Iperuûasu”, step by step

StepLanguageWordMeaning
1Old Tupi-gûasucombining form of gûasu; big
2Proto-Tupi-Guarani*-wat͡ʃuaugmentative suffix
Every word from Proto-Tupi-Guarani *-wat͡ʃu →Every word from Old Tupi -gûasu →
Iperuûasu — Etymology, Origin & Word History | Etymology Explorer