Where does “threescore” come from?

Threescore comes from Old English þrī-score, where þrī derives from Proto-Germanic þrīz and ultimately Proto-Indo-European tréyes, both meaning three.

threescore (English): Sixty

Definitions

  1. Sixty

Ancestry of “threescore”, step by step

threescore traces back through two separate lines of ancestry.

via English score

StepLanguageWordMeaning
1EnglishscoreThe total number of goals, points, runs, etc....
2Middle Englishscorescore
3Old Englishscorunotch; tally; score
4Old Norseskórshoe
5Proto-Germanicskōhazshoe
6Proto-Indo-Europeanskewk-
7Proto-Indo-European(s)kew-to caw, to howl; to cover, hide; to cover, hide,...

via English three

StepLanguageWordMeaning
1EnglishthreeA numerical value after two and before four....
2Middle Englishthrethree
3Old Englishþrīthree
4Proto-West Germanicþrīʀthree
5Proto-Germanicþrīzthree
6Proto-Indo-European*tréyes
Every word from Proto-Indo-European (s)kew-Every word from Proto-Indo-European skewk-Every word from Proto-Germanic skōhaz