Online Etymology DictionaryThis is a map of the wheel-ruts of modern English. Etymologies are not definitions; they're explanations of what our words meant and how they sounded 600 or 2,000 years ago. The dates beside a word indicate the earliest year for which there is a surviving written record of that word (in English, unless otherwise indicated). This should be taken as approximate, especially before about 1700, since a
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シソーラス・類語辞典
http://www6.ocn.ne.jp/~godbless/dictionary/index.html
