both的意思是：
1、形容詞adj.兩...（都）,兩個...（都）
例句：Both his eyes were seriously burned.他的雙眼都嚴重燒傷了。
2、代詞pron.兩者（都）;兩個（都）;雙方（都）
例句：Why not buy both?為什麽不把兩件都買下？
3、副詞adv.並；又；兩者皆
例句：We like Amy and Phil both.艾米和菲爾兩個我們都喜歡。
4、連詞conj.既；且；和；都
例句：The prospects both excited and worried me.這前景既使我激動又令我憂慮。
英文詞源
both: The Old English word for ‘both’ was?bēgen?(masculine; the feminine and neuter form was?bā), a relative of a wide range of Indo- European words denoting ‘each of two’, including the second syllables of Old Slavic?oba?and Latin?ambō?(represented in English?ambidextrous).?
there are several theories, all similar, and deriving the word from the tendency to say "both the." One is that it is Old English?begen?(masc.) "both" (from Proto-Germanic?*ba, from PIE?*bho?"both") +?-extended base.?