eighteenWiktionary 原文英/ˈeɪ.tiːn/美/ˈeɪ(t).tin/num.十八，十八个中文释义来自 ECDICT构词拆解eigheight词干teen-teen后缀-teenUsed to form cardinal numbers from thirteen to nineteen.词源链原始日耳曼语Proto-Germanic约前 500–公元 200 年*ahtōutehun↓ 继承古英语Old English约 450–1150 年eahtatīene↓ 继承中古英语Middle English约 1150–1500 年eightetene↓ 继承词源说明From Middle English eightetene, eiȝtene, ehtetene, from Old English eahtatīene, eahtatēne, from Proto-Germanic *ahtōutehun. Cognate with West Frisian achttjin, Dutch achttien, German achtzehn, Danish atten.Equivalent to eight + -teen.释义数词numeral1The cardinal number occurring after seventeen and before nineteen, represented in Roman numerals as XVIII and in Arabic numerals as 18.同族词派生词 7Eighteen Mile·eighteen-wheeler·eighteenfold·