Origin of ten
- Middle English from Old English tīen dekm̥ in Indo-European roots
From American Heritage Dictionary of the English Language, 5th Edition
- From Middle English ten, tene, from Old English tīen (“ten”), from Proto-Germanic *tehun (“ten”), from Proto-Indo-European *déḱm̥t (“ten”). Cognate with Scots ten, tene (“ten”), West Frisian tsien (“ten”), Eastern Frisian tjoon (“ten”), North Frisian tiin (“ten”), Dutch tien (“ten”), German zehn (“ten”), Swedish tio (“ten”); and with Sanskrit दश, Ancient Greek δέκα (deka), Albanian dhjetë, Latin decem, Irish deich, Serbo-Croatian deset. See also teen.