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TOEFL IELTS BNC: 3595 COCA: 3428
compound
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noun /ˈkɒmpaʊnd/
singularcompound
pluralcompounds
  1. 1
    [C] chemistry a chemical substance that consists of two or more elements that together form a molecule. Each different compound has a fixed ratio of elements. For example the water compound (H2O) consists of two hydrogen atoms and one oxygen atom 化合物

    Why do chemical compounds behave as they do? 化合物为什么会有其自身这些特性？

    Water is a compound of hydrogen and oxygen. 水是氢和氧的化合物。

     Synonyms and related words
    Types of chemical substance: acid, alkali, base...
    1. a.
      [C/U] something that consists of two or more substances mixed together 混合物

      a herbal compound used for treating headaches 治头疼的混合草药

       Synonyms and related words
      Mixtures and combinations: mixture, blend, combination...
  2. 2
    [C] a combination of things 组合

    John and Steve working together? That's a lethal compound. 约翰和史蒂夫一起工作？那是个很危险的组合。

     Synonyms and related words
    Mixtures and combinations: mixture, blend, combination...
  3. 3
    [C] an enclosed area where a particular group of people live, or where people such as soldiers and prisoners can exercise （围有围墙的）大院（如军营、监狱等）
     Synonyms and related words
    Relating to prison life: chain, compound, conjugal visit...
  4. 4
    [C] linguistics a combination of two or more words that is used as a single word. The three main types of compound are noun compounds (for example ‘bus stop'), adjective compounds (for example ‘self-centred'), and verb compounds (for example to ‘windsurf'). 复合词
     Synonyms and related words
    Linguistic terms relating to word formation and phrase building: affix, affixation, anaphora...
compound
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verb [T] /kəmˈpaʊnd/
present tense
I/you/we/theycompound
he/she/itcompounds
present participlecompounding
past tensecompounded
past participlecompounded
  1. 1
    to make a problem or difficult situation worse 加大（困难）；加重

    Their problems are compounded by the fact that Mary's just lost her job. 他们的困难因玛丽刚刚失业而变得更加严重了。

     Synonyms and related words
    To make something worse: worsen, compound, escalate...
  2. 2
    to mix two or more substances together in order to make a new substance or product 使混合；使合成
     Synonyms and related words
    To mix things, or to become mixed: mix, dissolve, stir in...
compound
adjective [only before noun] /ˈkɒmpaʊnd/
  1. 1
    made up of two or more parts 复合的

    a compound leaf 复叶

     Synonyms and related words
    Consisting of two or more parts, things or features: quadripartite, dual, composite...
  2. 2
    linguistics a compound noun, adjective, or verb is a combination of two or more words （名词、形容词、动词等）复合的
     Synonyms and related words
    Describing words, clauses and sentences: anaphoric, cataphoric, compound...
TOEFL IELTS BNC: 3595 COCA: 3428
compound

noun¹

 1chemical化學品ADJECTIVE | VERB + COMPOUND | COMPOUND + VERB | PREPOSITION ADJECTIVE➤chemical化合物◇Scientists have produced a new chemical compound.科學家製造了一種新的化合物。➤inorganic, organic無機／有機化合物▸➤synthetic合成化合物➤natural天然化合物▸➤molecular, simple分子／簡單化合物◇Dalton believed that the simplest compound of two elements must have one atom of each.道爾頓認為由兩種化學元素組成的最簡單化合物必須含有每種元素的一個原子。➤active, toxic, volatile活性／有毒／揮發性化合物▸➤carbon, iron, etc.碳化合物、鐵化合物等VERB + COMPOUND➤form, make, produce形成化合物；產生化合物◇At the right temperature, the chemicals will form a compound.溫度適宜時，這些化學品就會形成一種化合物。➤develop, synthesize研製／人工合成化合物➤discover, identify發現／鑒定化合物➤isolate分離化合物COMPOUND + VERB➤contain sth化合物包含⋯▸➤be derived from sth, be found in sth, derive from sth, occur化合物來自⋯；化合物可在⋯中找到；化合物產生◇compounds derived from rainforest plants來自雨林植物的化合物PREPOSITION➤compound of⋯化合物◇a compound of oxygen and hydrogen氫氧化合物
compound

noun²

 2area of land and buildings土地及建築區ADJECTIVE | PREPOSITION ADJECTIVE➤military, palace, prison軍營；宮殿群；監獄院落▸➤secure, walled嚴密把守的區域；有圍牆的建築群◇Police are investigating a raid on a secure compound.警方正在調查一起發生在一處嚴密把守的區域中的襲擊事件。PREPOSITION➤in a/the compound, inside a/the compound在建築群內◇life inside the prison compound監獄大院裏的生活
TOEFL IELTS BNC: 3595 COCA: 3428
compound noun
⇨ courtyard (the palace compound) ⇨ mixture (a chemical compound)compound verb
⇨ weaken

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