Where does “septuaginta” come from?

septuaginta (Latin) comes from Latin septmāginta, from Proto-Indo-European septm̥̄ḱomt, from Proto-Indo-European septḿ̥-dḱomt — seven-ten.

Ancestry of “septuaginta”, step by step

Step	Language	Word	Meaning
1	Latin	septmāginta	—
2	Proto-Indo-European	septm̥̄ḱomt	—
3	Proto-Indo-European	septḿ̥-dḱomt	seven-ten

septuaginta — Etymology, Origin & Word History | Etymology Explorer