Where does “sternity” come from?

sternity (English) comes from English Stern, from English tern, from Middle English terne, from Old French terne, from Latin ternas, from Latin terni, from Latin ter, from Latin terr.

sternity (English): The quality of being stern

Definitions

  1. The quality of being stern

Ancestry of “sternity”, step by step

sternity traces back through two separate lines of ancestry.

via English Stern

StepLanguageWordMeaning
1EnglishSternHaving a hardness and severity of nature or manner
2EnglishternAny of various sea birds of the family Sternidae...
3Middle Englishterne
4Old Frenchternedull, dim
5Latinternasaccusative feminine plural of terni
6Latinternithree each; three at a time
7Latinterthrice
8Latinterr
9Old Latintris
10Proto-Italictrēsthree
11Proto-Indo-European*tréyes

via English ity

StepLanguageWordMeaning
1Englishity
2Ingrian-uUsed to form nouns from verbs
Every word from Proto-Indo-European *tréyes