Where does “septuagenarianism” come from?

septuagenarianism (English) comes from English septuagenarian, from Latin septuagenarius, from Latin septuāgēnus, from Latin septuāgintā, from Latin septmāginta, from Proto-Indo-European septm̥̄ḱomt, from Proto-Indo-European septḿ̥-dḱomt — seven-ten.

septuagenarianism (English): The condition of being in one's eighth decade of life, aged between 70 and 79

Definitions

  1. The condition of being in one's eighth decade of life, aged between 70 and 79

Ancestry of “septuagenarianism”, step by step

septuagenarianism traces back through two separate lines of ancestry.

via English septuagenarian

StepLanguageWordMeaning
1EnglishseptuagenarianBeing between the age of 70 and 79, inclusive. In...
2Latinseptuagenariusseptuagenarian, of or relating to the number...
3Latinseptuāgēnusseventy each; seventy at a time
4Latinseptuāgintā
5Latinseptmāginta
6Proto-Indo-Europeanseptm̥̄ḱomt
7Proto-Indo-Europeanseptḿ̥-dḱomtseven-ten

via English ism

StepLanguageWordMeaning
1EnglishismAn ideology, system of thought, or practice that...
2English-ismUsed to form nouns of action or process or result...
3Latin-ismus-ism
4Ancient Greek-ισμόςForms abstract nouns
5Ancient Greek-μόςForms abstract nouns
6Proto-Indo-European-mósCreates action/result nouns from verb stems
Every word from Proto-Indo-European septḿ̥-dḱomtEvery word from Proto-Indo-European septm̥̄ḱomtEvery word from Latin septmāginta