The story
- Proto-Indo-European*(s)ker-
- Proto-Germanic*skurō
- Old Norseskor
- Old Englishscoru
- Middle Englishscore
- English todayscore
From Middle English score, skore, schore, from Old English scoru (“notch; tally; score”), from Old Norse skor, from Proto-Germanic *skurō (“incision; tear; rift”), which is related to *skeraną (“to cut”), ultimately from Proto-Indo-European *(s)ker- (“cut”). Cognate with Icelandic skora, Swedish skåra, Danish skår. Related to shear. For the sense “twenty”: The mark on a tally made by drovers for every twenty beasts passing through a tollgate.
Words from the same roots
Proto-Germanic*skurō all →
Proto-Indo-European*(s)ker- all →
Etymology from Wiktionary, CC BY-SA 4.0.