From Middle English ten, tene, from Old English tīen, from Proto-West Germanic *tehun, from Proto-Germanic *tehun, from Proto-Indo-European *déḱm̥.
Cognate with Scots ten, tene, West Frisian tsien ("ten"), Saterland Frisian tjoon ("ten"), North Frisian tiin ("ten"), Dutch tien ("ten"), German zehn ("ten"), Norwegian ti ("ten"), Swedish tio ("ten").
Non-Germanic cognates include Albanian dhjetë, Old Armenian տասն, Lithuanian dešimt, Old Church Slavonic десѧть, Old Breton dec, Old Irish deich, Ancient Greek δέκα, Sanskrit दश, Old Persian *𐎭𐎰, Latin decem, Tocharian A śäk.