Where does “અવેસ્તા” come from?

અવેસ્તા (Gujarati) comes from Persian اوستا, from Middle Persian ʾp(y)stʾk'.

Ancestry of “અવેસ્તા”, step by step

StepLanguageWordMeaning
1PersianاوستاAlternative form of استاد
2Middle Persianʾp(y)stʾk'
Every word from Middle Persian ʾp(y)stʾk'Every word from Persian اوستا
અવેસ્તા — Etymology, Origin & Word History | Etymology Explorer