| 5000 Vocabulary List for Visiting Scholars in the USA - Page 620 | |||
| Word | Type | Used in a Sentence | Synonym |
| underground | noun | There was an underground trade in diamonds. | illegally |
| adv. | We worked underground during the war. | in secret | |
| underline | verb | Each major word should be underlined. | draw line under |
| verb | You should underline the differences. | stress | |
| underneath | adj. | It was underneath some papers. | below |
| adv. | I worked underneath Mr. Jones. | under control of | |
| understand | verb | I understand what you want. | comprehend |
| verb | I understand that he does want to go. | assume | |
| understanding | noun | We have an understanding about it. | agreement |
| noun | It's my understanding he isn't happy. | belief | |
| undertake | verb | I will undertake this task. | agree to do |
| underwear | noun | Everyone should use underwear. | underclothes |
| undo | verb | We can not undo the wrong we have done. | reverse |