dauntless，fearless，intrepid，dreadless，impavid ；

[例句] 英勇无畏的男女 brave men and women

[例句] 某些无畏的人仍然准备作此旅行. Some intrepid individuals were still prepared to make the journey.

have no limits，know no end，know no measure ；

[例句] 他的权力欲是无止境的. His greed for power knows no bounds.

[例句] 上游无止境. One can always aim higher.

incompetent，inefficient，[法] inept，impuissant，shiftless ；

[例句] 懒惰兼无能的警官令公众失望。 Lazy and incompetent police officers are letting the public down.

[例句] 他是个无能的政客. He was an inept politician.

impayable，inestimable，[化] non-valent，invaluable，priceless ；

[例句] 宫殿里到处都是无价的古玩. The palace is full of priceless antiques.

[例句] 家具古老而舒适 —— 有皮靠背椅, 报纸架, 无价的古董桌子. The furniture was old and comfortable - leather couches, newspaper racks, priceless antique tables.

analgesia，anodynia，aponia，indolence ；

[例句] 针灸疗法柔和，无痛，而且总是令人非常放松。 Acupuncture treatment is gentle, painless, and, invariably, most relaxing.

[例句] 牛应该被干净利落地无痛屠宰。 Cattle should be killed cleanly and humanely.

imperceptibly，virtually，invisibly ；

[例句] 她无形中成了我们的顾问. She has virtually become our adviser.

[例句] 让学生无形中陷入了性格 、 个性血统论的条条框框. Let the student fall into the disposition, the individuality bloodline - ism rules imperceptibly.

harmless，immaculate，innocent，sinless，inculpable ；

[例句] 对峙双方都只是在瞄准射击无辜的旁观者。 Both groups on either side are just picking off innocent bystanders.

[例句] 科尔曼坚称他是无辜的。 Coleman has never wavered in his claim that he is innocent.

irrespective of，[法] irrelevant，removed，unconcerned，irrespective ；

[例句] 不要管与自己无关的事。 Don't interfere in what doesn't concern you.

[例句] 别参与和自己无关的事. Do not meddle in things that do not concern you.

dull，insipid，tasteless，uninteresting，flavourless ；

[例句] 氢气是一种无色 、 无味的气体. Hydrogen is a corlourless, odourless gas.

[例句] 她为他枯燥无味的生活带来了从未有过的乐趣。 She had given him the only joy his arid life had ever known.

immoderate，excessive ；

[例句] 我有时会头脑发热，挥霍无度。 I can have a brainstorm and be very extravagant.

[例句] 尽管放荡无度，弗林英俊样貌并未有什么变化。 Flynn was still handsome, though dissipated.

nowhere ；

[例句] 当局征用旅馆房间安顿了3,000多名无处落脚的圣诞度假者。 Authorities requisitioned hotel rooms to lodge more than 3,000 stranded Christmas vacationers.

[例句] 这个可怜的家伙显然复活节无处可去。 The poor guy obviously didn't have any place to go for Easter.

abiosis，inanimation，nonlife ；

[例句] 岩石是无生命的物体。 A rock is an inanimate object.

[例句] 石头是一种无生命的物体. A stone is an inanimate object.

areflexia ；

[例句] 匹配负载阻抗之传输线上无反射. No reflection will appear on a line with matched load.

[例句] 研究弱激光驻波场中的无反射势阱. The reflectionless potential well affected by a standing laser field is studied.

atonity，atonalism，atonality ；

[例句] 大多数人对无调性作品的态度往往是不能接受的. The majority always turn an unfavorable attitude towards atonal composition.

[例句] 无调性音乐中既有宏伟动人之作,又有糟得吓人之作. There is great atonal music and terrible atonal music.

clinking，consummate，highest，paramount ；

[例句] 顶级的明星待遇和无上的权力体验肯定要数私人飞机了。 The biggest star perk, and the biggest power trip, must be the private plane.

[例句] 能够凭杆来被后人挂念是种无上的光荣. To be remembered by a pole is a great honor.

altruistic，disinterested，[计] egoless，self-giving ；

[例句] 他无私的精神表现在各个方面. His selfless spirit is revealed in every thing he does.

[例句] 作为一名教师,他是无私的. He is selfless as a teacher.

insensibility，-pathy，impassibility ；

[例句] 这封信既无热情又无感情。 The letter was devoid of warmth and feeling.

[例句] 当简爱说: “ 我们是平等的, 我不是无感情的机器. ” When Jane Eyre, said: " We are equal, I am a heartless machine. "

infinite，infinitely great，infinity ；

[例句] 不可能数到无穷大. It is impossible to count up to infinity.

[例句] 这些排列可以增加到无穷大。 These permutations multiply towards infinity.

cloudless ；

[例句] 无云的晴空镶嵌着无数颗闪烁的星星. The cloudless sky was jewelled with myriads of glittering stars.

[例句] 天空意想不到地呈现出一种清澈无云的美丽. The scenery up here has an unexpectedly serene beauty.

derelict，[法] ownerless，unowned ；

[例句] 这儿无主的狗真多 呀 ! What a lot of ownerless dogs there are here!

[例句] 应该拘禁走失的无主的狗. Stray and unowned dogs should be impounded.