Where does “Gûatapytyba” come from?

Gûatapytyba (Old Tupi) comes from Old Tupi tyba, from Old Tupi -a, from Proto-Tupi-Guarani *-aβ — instrumentalizer suffix.

Ancestry of “Gûatapytyba”, step by step

Gûatapytyba traces back through two separate lines of ancestry.

via Old Tupi tyba

StepLanguageWordMeaning
1Old Tupitybagathering
2Old Tupi-aforms nouns from a word's stem
3Proto-Tupi-Guarani*-aβinstrumentalizer suffix

via Old Tupi gûatapy

StepLanguageWordMeaning
1Old Tupigûatapya very large sea snail, a univalve gastropod mollusk with a large opening<!
Every word from Proto-Tupi-Guarani *-aβ →Every word from Old Tupi -a →Every word from Old Tupi tyba →