unprecedented,(adj),/ʌnˈpres.ɪ.den.tɪd/,"Không hề có; chưa hề thấy, chưa từng nghe thấy; vô tiền khoáng hậu.
=that has never happened, been done or been known before",The situation is [unprecedented] in modern times.<br>This century has witnessed environmental destruction on an [unprecedented] scale.<br>Unemployment has reached an [unprecedented] level.,"<img src=""paste-4672924419058.jpg"">",[sound:unprecedented_uk.mp3],[sound:Unemployment_has_reached_an_unprecedented_level._us.mp3]
unrealistic,(adj),/ˌʌn.riː.əˈlɪs.tɪk/,"thiếu thực tế, không tưởng
=having a wrong idea of what is likely to happen or of what you can really do; not based on facts",I think she had [unrealistic] expectations of motherhood.<br>Expecting four year old children to sit quietly for a whole hour is just completely [unrealistic].<br>It's [unrealistic] to expect an answer before next week.,"<img src=""unrealistic_expectations-1024x584.jpg"">",[sound:unrealistic_uk.mp3],[sound:It's_unrealistic_to_expect_an_answer_before_next_week._us.mp3]
unreasonable,(adj),/ʌnˈriː.zən.ə.bəl/,"Vô lý, đòi hỏi quá mức
=not fair; expecting too much",The job was beginning to make [unreasonable] demands on his free time.<br>The fees they charge are not [unreasonable].<br>It seems [unreasonable] to expect one person to do both jobs.,"<img src=""boss21.jpg"">",[sound:unreasonable_uk.mp3],[sound:It_seems_unreasonable_to_expect_one_person_to_do_both_jobs._us.mp3]
unrelated,(adj),/ˌʌn.rɪˈleɪ.tɪd/,"Không có liên quan.
=not connected; not related to something else [synonym] unconnected",The two events were totally [unrelated].<br>In my free time I like to do things that are [unrelated] to my work.<br>Police said his death was [unrelated] to the attack.,"<img src=""paste-16630113370508.jpg"">",[sound:unrelated_uk.mp3],[sound:Police_said_his_death_was_unrelated_to_the_attack._us.mp3]
unspoiled,(adj),/ʌnˈspɔɪld/,"(cảnh quan) vẫn còn giữ nguyên vẻ đẹp tự nhiên, chưa bị tác động bởi con người
=(of a place) beautiful because it has not been changed or built on","[unspoiled] countryside<br>It's a country of stunning landscapes and [unspoiled] beaches.<br>Maninjau is a place of natural beauty, [unspoiled] by tourist developments.","<img src=""the-unspoiled-nature-of-azores-portugal-1.jpg"">",[sound:unspoiled_uk.mp3],"[sound:Maninjau_is_a_place_of_natural_beauty,_unspoiled_by_tourist_developments._us.mp3]"
viable,(adj),/ˈvaɪ.ə.bəl/,"Có thể thành tựu được (kế hoạch).
=that can be done; that will be successful [synonym] feasible","In order to make the company [viable], it will unfortunately be necessary to reduce staffing levels.<br>I am afraid your plan is not commercially/economically/financially/politically [viable].<br>The company had to seek other ways to remain [viable].","<img src=""pasos-para-analizar-la-viabilidad-de-tu-idea-de-negocio_reference.jpg"">",[sound:viable_uk.mp3],[sound:The_company_had_to_seek_other_ways_to_remain_viable._us.mp3]
vital,(adj),/ˈvaɪ.təl/,"Sống còn, quan trọng.
=necessary or essential in order for something to succeed or exist,extremely important",Reading is of [vital] importance in language learning.<br>It's absolutely [vital] that you do exactly as I say.<br>She had found out some information of [vital] importance.,"<img src=""paste-1975684956680.jpg"">",[sound:vital_uk.mp3],[sound:She_had_found_out_some_information_of_vital_importance._us.mp3]
worthwhile,(adj),/ˌwɜːθˈwaɪl/,"Quan trọng, thú vị hoặc đáng bỏ thời gian, tiền của hoặc nỗ lực; đáng giá; bõ công.
=useful, important, or good enough to be a suitable reward for the money or time spent or the effort made","The smile on her face made it all [worthwhile].<br>If you need him on this project, you've got to make it financially [worthwhile] for him<br>She considers teaching a [worthwhile] career.","<img src=""paste-4239132721402.jpg"">",[sound:worthwhile_uk.mp3],[sound:She_considers_teaching_a_worthwhile_career._us.mp3]