Seventeen
来自Big Physics
Old English seofontīene, from the Germanic base of seven.
wiktionary
From Middle English seventene, from Old English seofontīene, from Proto-Germanic *sebuntehun. Cognate with Dutch zeventien, West Frisian santjin, German siebzehn, Danish sytten.
etymonline
seventeen (adj., n.)
"1 more than sixteen; the number which is one more than sixteen; a symbol representing this number;" late Old English seofontyne; see seven + -teen. Replacing Old English form seofon-teoða. Compare German siebzehn, a contraction of Middle High German siben-zehen.
