Collins COBUILD Advanced Learner’s Dictionary

un|de|tect|ed /ʌ nd I te kt I d/ ADJ [ADJ after v, ADJ n, v-link ADJ ] If you are undetected or if you do something undetected , people do not find out where you are or what you are doing. □  …the spy ring had a fifth member as yet still undetected. □  They managed to get away from the coast undetected. □  …an undetected cancer.

un|de|vel|oped /ʌ nd I ve ləpt/

1 ADJ [usu ADJ n] An undeveloped country or region does not have modern industries and usually has a low standard of living. □  The big losers will be the undeveloped countries.

2 ADJ Undeveloped land has not been built on or used for activities such as mining and farming. □  Vast tracts of the country are wild and undeveloped. □  …the world's largest undeveloped gold deposit outside of South Africa.

un|did /ʌ nd I d/ Undid is the past tense of undo .

un|dies /ʌ ndiz/ N‑PLURAL [oft poss N ] You can refer to a woman's or girl's underwear as their undies . [INFORMAL ]

un|dig|ni|fied /ʌnd I gn I fa I d/ ADJ If you describe someone's actions as undignified , you mean they are foolish or embarrassing. □  It is sad to see a county confine its activities to undignified public bickering. □  All this public outpouring is so undignified.

un|di|lut|ed /ʌ nda I luː t I d/

1 ADJ [usu ADJ n] If you describe someone's feelings or characteristics as undiluted , you are emphasizing that they are very strong and not mixed with any other feeling or quality. □  I will look back at this one with undiluted pleasure. □  Her Irish accent, after thirty-odd years in London, is undiluted.

2 ADJ A liquid that is undiluted has not been made weak by mixing it with water.

un|dis|ci|plined /ʌ nd I s I pl I nd/ ADJ If you describe someone as undisciplined , you mean that they behave badly or in a disorganized way. □  …a noisy and undisciplined group of students. □  Teachers often view youth workers as undisciplined and ineffectual.

un|dis|closed /ʌnd I skloʊ zd/ ADJ [usu ADJ n] Undisclosed information is not revealed to the public. □  The company has been sold for an undisclosed amount.

un|dis|cov|ered /ʌ nd I skʌ və ^r d/ ADJ Something that is undiscovered has not been discovered or noticed. □  Some of the islands in the western Pacific Ocean are an undiscovered gem. □  This site remained undiscovered, though long sought, until recent times.

un|dis|guised /ʌ nd I sga I zd/ ADJ [usu ADJ n] If you describe someone's feelings as undisguised , you mean that they show them openly and do not make any attempt to hide them. □  Hean looked down at Bauer in undisguised disgust. □  By mid-season the hostility between the two was undisguised.

un|dis|mayed /ʌ nd I sme I d/ ADJ [v-link ADJ ] If you say that someone is undismayed by something unpleasant or unexpected, you mean that they do not feel any fear, worry, or sadness about it. [FORMAL ] □ [+ by ] He was undismayed by the prospect of failure.

un|dis|put|ed /ʌ nd I spjuː t I d/

1 ADJ If you describe a fact or opinion as undisputed , you are trying to persuade someone that it is generally accepted as true or correct. □  …the undisputed fact that he had broken the law. □  …his undisputed genius.

2 ADJ If you describe someone as the undisputed leader or champion, you mean that everyone accepts their position as leader or champion. □  At 78 years of age, he's still undisputed leader of his country. □  …after 10 years of undisputed power.