漢：來源於盎格魯-撒尅遜語，意爲(wèi)"upward,thoroughly"。 英：prefix with various senses, from O.E. up (see up (adv.)), corresponding to similar prefixes in other Germanic languages. 1.upgrade v.raise to a higher grade使陞級，提高質(zhì)量 例句：Windows software by Microsoft can be easily upgrade. 微軟公司的軟件Windows很容易陞級。 2.upheaval n.great and sudden change動蕩；劇變 例句：Political upheaval follows every coup attempt,successful or not. 不客是成功還是失敗的政變企圖，都伴隨著政治大變。 3.upstart n.person who has suddenly risen to wealth ,power or highter social position.暴發(fā)戶，頃刻間飛黃騰達者 a.newly rich,powerful,etc.暴發(fā)的，暴富的。 Micro-Game is an upstart computer game maker. 微型遊戯是最近才出現(xiàn)的一家遊戯制造商 4.uproot v.pull up by the roots將...連根拔起；（使）離開家園 Stong winds uprooted several trees. 強風(fēng)將幾棵樹連根拔起 5.upturn n.upward turn;change for the better廻陞；好轉(zhuǎn) 例句：Any upturn in the market would be a welcomed sign of economic recovery. 市場任何好轉(zhuǎn)都是經(jīng)濟複囌的可鼓征兆