1704963155

1704963156

1704963157

1704963158

1704963159 张道真英语用法（大众珍藏版·第二版） [:1704917906]

1704963160 张道真英语用法（大众珍藏版·第二版） U

1704963161

1704963162 张道真英语用法（大众珍藏版·第二版） [:1704917907]

1704963163 885 un-

1704963164

1704963165 un-是最常用的前缀之一。

1704963166

1704963167 （1）可以用在某些形容词（或副词）前，构成反义词，表示“不”，如：

1704963168

1704963169 unacceptable unaccountable unaccountably unadvisable unapproachable unavailable unaware(s) unavoidable unbelievable unbelievably unceremonious uncomfortable uncommon uncompromising unconditional unconquerable unconscious(ly) undesirable undoubtedly undue uneconomic unemotional unendurable unequal unessential uneven uneventful unfair unfavourable unfit unforgettable unforgivable unfortunate(ly) ungrammatical ungrateful unhappily unimaginable unimportant unjust unlawful unlike unlikely unlucky unnatural unnecessary unobtainable unofficial unpardonable unpleasant unprejudiced unprofitable unquestionable unquestionably unreadable unreal unrecognizable unreliable unsatisfactory unscientific unscrupulous unselfish unskilful unspeakable unsuccessful unsystematic unthinkable untrue untrustworthy unusual unwavering unwelcome unwell unwilling(ly) unwise （2）或加在动词前，表示“解开”、“打开”、“拿开”等：

1704963170

1704963171 unbosom unburden unbutton uncoil uncover undo undress unearth unfasten unfold unhang unknit unlace unleash unload unlock unmask unmoved unpack unpin unquote unscrew unstring untie unwrap （3）还可加在过去分词前，表示“不……”、“没有……”等，如：

1704963172

1704963173 unabridged unaccompanied unaccustomed unaffected unaided unarmed unbalanced unconcerned uncultivated uncultured undreamt-of uneducated unemployed unexpected unfinished unforeseen unfounded unfulfilled unfurnished ungrounded unheard-of unidentified uninvited uninhabited unknown unmarried unprecedented unqualified unreserved unroll unread unrestrained unsatisfied unskilled unseen unstressed untruth （4）还可和个别名词构成反义词：

1704963174

1704963175 张道真英语用法（大众珍藏版·第二版） [:1704917908]

1704963176 uncertainty uneasiness unemployment unhappiness unpleasantness unrest unwillingness 886 under-

1704963177

1704963178 under-也是一个常用前缀。

1704963179

1704963180 （1）和名词构成合成词，表示“下面的”、“里面的”：

1704963181

1704963182 underbelly 下腹部

1704963183

1704963184 undercurrent 潜流

1704963185

1704963186 underclothes 内衣

1704963187

1704963188 undergarment 内衣

1704963189

1704963190 underground 地下的

1704963191

1704963192 underpants 内裤

1704963193

1704963194 undersea 海底（下）的

1704963195

1704963196 underside 下侧（面）

1704963197

1704963198 underwater 水下的

1704963199

1704963200 underworld 下层社会，黑社会

1704963201

1704963202 还可表示“下一级的”：

1704963203

1704963204 undergraduate 本科生（比研究生低的）

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