1.unequivocally ad.不含糊地(unambiguously)；明確地(clearly)
例:Microwave irradiations were considered unequivocally to produce “thermal effects”.
2.uneven a.不規則的(not uniform)；不平坦的(rough);不均勻的(unequal)
詞根記憶：un（表否定）+even(平的，一致的)--不一致的--不規則的
例：An ancient surface usually has uneven weathering.
派生詞：unevenly( ad.不均衡地)
3.unfavorable a．不宜的：令人不快的(not pleasing)；不順利的(not propitious)
詞根記憶：un(不)+favorable(良好的，討人喜歡的)--令人不快的
例：In only one of these last eleven years was the weather unfavorable for growing citrus crops.
派生詞：unfavorably( ad.不利地：不適宜地)
同根詞：favorite(a．最喜愛的)
4.unification n．統一；聯合(the act, process, or result of unifying)
詞根記憶：來自unify(v.統一，使成一體)
例：national unification民族統一 // economic unification經濟聯合
5.uniform n．制服(the dress of a distinctive design or fashion worn by members of a particular group and serving as a means of identification);a.統一的( consonant)；相同的(same)
詞根記憶：uni（單一）+form(形式)--形式單一--統一的
例：Some schools require all of its students to wear uniforms while at school.// Do you think all unprocessed cacao beans contain a uniform amount of caffeine?
派生詞：uniformity(n.同樣，一致)；uniformly( ad.一律地)
6.unilateral a．單側的；單方面的(one sided; affecting only one side)
詞根記憶：unr（單）+later(邊)+al--單邊的--單側的
例：It becomes more difficult for Congress to exercise unilateral authority over Native American affairs.
派生詞：unilaterally( ad.單方面地)
同根詞：bilateral(a.雙邊的)
7.uninitiated a．外行的，缺乏豐富知識的(inexperienced)
聯想記憶：un(表否定)+initiate(傳授)+d--不能傳授知識的--缺乏豐富知識的
例：the uninitiated reader缺乏相應知識的讀者
8.unionist n．工會會員：聯合主義者(an advocate or supporter of union or unionism)
詞根記憶：來自union(n.聯盟，協會)
例：It was not shared by most unionists until 1935.
同根詞：unionism(n．工會主義：聯合主義)
9.unionization n．聯合，組織工會(the action of organizing a labor union)
例：Politicians and administrators sometimes oppose unionization of clerical workers(行政人員)．