Where does “'Ypa'ũgûasu” come from?

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

Ancestry of “'Ypa'ũgûasu”, 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 →